# US 11,306,162 B2 · Metallocenes with two -Si-Si- bridges

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- Number: US 11,306,162 B2
- Document ID: US11306162B2
- Status: Granted
- Kind: B2
- Application number: 16/843,642
- Filed: 2020-04-08
- Published: 2020-10-22
- Granted: 2022-04-19
- Earliest claimed: 2019-04-17
- Assignees: ExxonMobil Chemical Patents Inc.
- Applicants: ExxonMobil Chemical Patents Inc.
- Inventors: Subramaniam Kuppuswamy; Matthew W. Holtcamp; Matthew S. Bedoya; Laughlin G. McCullough
- Web page: https://patentgrep.com/patent/US11306162B2

## CPC

- C08F 4/65927: {two cyclopentadienyl rings being mutually bridged}
- C08F 210/16: Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
- C08F 2/34: Polymerisation in gaseous state
- C08F 4/65916: {supported on a carrier, e.g. silica, MgCl2, polymer}
- C08F 10/02: Ethene
- C08F 4/65912: {in combination with an organoaluminium compound}
- C08F 2420/07: Heteroatom-substituted Cp, i.e. Cp or analog where at least one of the substituent of the Cp or analog ring is or contains a heteroatom
- C08F 2420/12: Long bridge, i.e. Cp or analog where the bridging unit linking the two Cps or analogs is composed of at least two atoms which are not part of a cycle and which are not an ethylene bridge
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

The present disclosure provides bridged metallocene catalyst compounds including at least two —Si—Si— bridges, catalyst systems including such compounds, and uses thereof. Catalyst compounds of the present disclosure can be hafnium-containing compounds having one or more cyclopentadiene ligand(s) substituted with one or more silyl neopentyl groups and linked with at least two Si—Si-containing bridges. In another class of embodiments, the present disclosure is directed to polymerization processes to produce polyolefin polymers from catalyst systems including one or more olefin polymerization catalysts, at least one activator, and an optional support.

## Claims

### Claim 1

A catalyst compound represented by Formula (I):
wherein:
M is a group 4 metal;
each of R1, R2, and R3 is independently hydrogen, alkoxide, C1 to C40 substituted or unsubstituted hydrocarbyl, or —R15—SiR′3 where R15 is C1 to C4 hydrocarbyl, and each R′ is independently hydrogen or C1 to C20 substituted or unsubstituted hydrocarbyl;
each of R4, R5, and R6 is independently hydrogen, alkoxide, C1 to C40 substituted or unsubstituted hydrocarbyl, or —R15—SiR′3 where R15 is C1 to C4 hydrocarbyl, and each R′ is independently hydrogen or C1 to C20 substituted or unsubstituted hydrocarbyl, or two or more of R4, R5, and R6 form a substituted or unsubstituted, saturated, partially unsaturated or aromatic, cyclic or polycyclic substituent ring;
each of X1 and X2 is independently a diene ligand, an alkylidene ligand, or a univalent anionic ligand;
each of T1, T2, T3, and T4 is independently Si or Ge;
each of R7, R8, R9, R10, R11, R12, R13, and R14 is independently hydrogen or a C1-C20 containing hydrocarbyl, substituted hydrocarbyl, or one or more of R7 and R8, R9 and R10, R11 and R12, and R13 and R14 join to form a substituted or unsubstituted, saturated, partially unsaturated, cyclic or polycyclic substituent;
T1 is bonded to Carbon 1, Carbon 4, or Carbon 5;
R1 is bonded to Carbon 1, Carbon 4, or Carbon 5;
R2 is bonded to Carbon 1, Carbon 4, or Carbon 5;
T2 is bonded to Carbon 1′, Carbon 4′, or Carbon 5′;
R5 is bonded to Carbon 1′, Carbon 4′, or Carbon 5′; and
R6 is bonded to Carbon 1′, Carbon 4′, or Carbon 5′.

### Claim 2 (depends on 1)

The catalyst compound of claim 1, wherein M is zirconium or hafnium.

### Claim 3 (depends on 1)

The catalyst compound of claim 1, wherein one or more of T1, T2, T3, and T4 is Si.

### Claim 4 (depends on 1)

The catalyst compound of claim 1, wherein each of T1, T2, T3, and T4 is Si.

### Claim 5 (depends on 1)

The catalyst compound of claim 1, wherein each of R7, R8, R9, R10, R11, R12, R13, and R14 is independently a C1-C20 containing hydrocarbyl.

### Claim 6 (depends on 1)

The catalyst compound of claim 1, wherein at least one of R1, R2, and R3 is independently C1 to C40 substituted or unsubstituted hydrocarbyl or —R15—SiR′3 wherein R15 is C1 to C4 hydrocarbyl, and each R′ is independently C1 to C20 substituted or unsubstituted hydrocarbyl, and at least one of R1, R2, and R3 is hydrogen.

### Claim 7 (depends on 1)

The catalyst compound of claim 1, wherein at least one of R1, R2, R3, R4, R5, and R6 is —R15—SiR′3 where R15 is C1 to C4 hydrocarbyl, and each R′ is independently hydrogen or C1 to C20 substituted or unsubstituted hydrocarbyl.

### Claim 8 (depends on 1)

The catalyst compound of claim 1, wherein R2 is —R15—SiR′3 wherein R15 is C1 hydrocarbyl, and each R′ is independently C1 to C20 unsubstituted hydrocarbyl.

### Claim 9 (depends on 8)

The catalyst compound of claim 8, wherein each R′ is methyl.

### Claim 10 (depends on 1)

The catalyst compound of claim 1, wherein at least one of R4, R5, and R6 is independently C1 to C40 substituted or unsubstituted hydrocarbyl or —R15—SiR′3 wherein R15 is C1 to C4 hydrocarbyl, and each R′ is independently C1 to C20 substituted or unsubstituted hydrocarbyl, and at least one of R4, R5, and R6 is hydrogen.

### Claim 11 (depends on 10)

The catalyst compound of claim 10, wherein one of R4, R5, and R6 is —R15—SiR′3 wherein R15 is C1 to C4 hydrocarbyl, each R′ is independently C1 to C20 substituted or unsubstituted hydrocarbyl, and three of R4, R5, and R6 is hydrogen.

### Claim 12 (depends on 10)

The catalyst compound of claim 10, wherein R5 is —R15—SiR′3 wherein R15 is C1 hydrocarbyl, and each R′ is independently C1 to C20 unsubstituted hydrocarbyl.

### Claim 13 (depends on 12)

The catalyst compound of claim 12, wherein each R′ is methyl.

### Claim 14 (depends on 1)

The catalyst compound of any of claim 1, wherein the complex is represented by Formula (II):
wherein:
M is a group 4 metal;
each of R1, R2, and R3 is independently hydrogen, alkoxide, C1 to C40 substituted or unsubstituted hydrocarbyl, or —R15—SiR′3 where R15 is C1 to C4 hydrocarbyl, and each R′ is independently hydrogen or C1 to C20 substituted or unsubstituted hydrocarbyl;
each of R4, R5, and R6 is independently hydrogen, alkoxide, C1 to C40 substituted or unsubstituted hydrocarbyl, or —R15—SiR′3 where R15 is C1 to C4 hydrocarbyl, and each R′ is independently hydrogen or C1 to C20 substituted or unsubstituted hydrocarbyl, or two or more of R4, R5, and R6 form a substituted or unsubstituted, saturated, partially unsaturated or aromatic, cyclic or polycyclic substituent ring;
each of X1 and X2 is independently a diene ligand, an alkylidene ligand, or a univalent anionic ligand;
each of T1, T2, T3, and T4 is independently Si or Ge; and
each of R7, R8, R9, R10, R11, R12, R13, and R14 is independently hydrogen or a C1-C20 containing hydrocarbyl, substituted hydrocarbyl, or one or more of R7 and R8, R9 and R10, R11 and R12, and R13 and R14 join to form a substituted or unsubstituted, saturated, partially unsaturated, cyclic or polycyclic substituent.

### Claim 15 (depends on 14)

The catalyst compound of claim 14, wherein M is zirconium or hafnium.

### Claim 16 (depends on 14)

The catalyst compound of claim 14, wherein one or more of T1, T2, T3, and T4 is Si.

### Claim 17 (depends on 14)

The catalyst compound of claim 14, wherein each of T1, T2, T3, and T4 is Si.

### Claim 18 (depends on 14)

The catalyst compound of claim 14, wherein each of R7, R8, R9, R10, R11, R12, R13, and R14 is independently a C1-C20 containing hydrocarbyl.

### Claim 19 (depends on 14)

The catalyst compound of claim 14, wherein at least one of R1, R2, and R3 is independently C1 to C40 substituted or unsubstituted hydrocarbyl or —R15—SiR′3 wherein R15 is C1 to C4 hydrocarbyl, and each R′ is independently C1 to C20 substituted or unsubstituted hydrocarbyl, and at least one of R1, R2, and R3 is hydrogen.

### Claim 20 (depends on 19)

The catalyst compound of claim 19, wherein at least one of R1, R2, R3, R4, R5, and R6 is —R15—SiR′3 where R15 is C1 to C4 hydrocarbyl, and each R′ is independently hydrogen or C1 to C20 substituted or unsubstituted hydrocarbyl.

### Claim 21 (depends on 19)

The catalyst compound of claim 19, wherein R2 is —R15—SiR′3 wherein R15 is C1 hydrocarbyl, and each R′ is independently C1 to C20 unsubstituted hydrocarbyl.

### Claim 22 (depends on 21)

The catalyst compound of claim 21, wherein each R′ is methyl.

### Claim 23 (depends on 14)

The catalyst compound of claim 14, wherein at least one of R4, R5, and R6 is independently C1 to C40 substituted or unsubstituted hydrocarbyl or —R15—SiR′3 wherein R15 is C1 to C4 hydrocarbyl, and each R′ is independently C1 to C20 substituted or unsubstituted hydrocarbyl, and at least one of R4, R5, and R6 is hydrogen.

### Claim 24 (depends on 23)

The catalyst compound of claim 23, wherein one of R4, R5, and R6 is —R15—SiR′3 wherein R15 is C1 to C4 hydrocarbyl, each R′ is independently C1 to C20 substituted or unsubstituted hydrocarbyl, and three of R4, R5, and R6 is hydrogen.

### Claim 25 (depends on 23)

The catalyst compound of claim 23, wherein R5 is —R15—SiR′3 wherein R15 is C1 hydrocarbyl, and each R′ is independently C1 to C20 unsubstituted hydrocarbyl.

### Claim 26 (depends on 25)

The catalyst compound of claim 25, wherein each R′ is methyl.

### Claim 27 (depends on 1)

The catalyst compound of claim 1, wherein the catalyst compound is selected from:
(Me4Si2)2(4-Me3SiCH2Cp)2ZrCl2, (Et4Si2)2(4-Me3SiCH2Cp)2ZrCl2, (iPr4Si2)2(4-Me3SiCH2Cp)2ZrCl2, (Ph4Si2)2(4-Me3SiCH2Cp)2ZrCl2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)2ZrCl2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)2ZrCl2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)2ZrCl2, (Me4Si2)2(4-Et3SiCH2Cp)2ZrCl2, (Et4Si2)2(4-Et3SiCH2Cp)2ZrCl2, (iPr4Si2)2(4-Et3SiCH2Cp)2ZrCl2, (Ph4Si2)2(4-Et3SiCH2Cp)2ZrCl2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)2ZrCl2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)2ZrCl2, (Me4Si2)2(4-Cy3SiCH2Cp)2ZrCl2, (Et4Si2)2(4-Cy3SiCH2Cp)2ZrCl2, (iPr4Si2)2(4-Cy3SiCH2Cp)2ZrCl2, (Ph4Si2)2(4-Cy3SiCH2Cp)2ZrCl2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)2ZrCl2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)2ZrCl2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)2ZrCl2, (Me4Si2)2(4-Me2PhSiCH2Cp)2ZrCl2, (Et4Si2)2(4-Me2PhSiCH2Cp)2ZrCl2, (iPr4Si2)2(4-Me2PhSiCH2Cp)2ZrCl2, (Ph4Si2)2(4-Me2PhSiCH2Cp)2ZrCl2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)2ZrCl2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)2ZrCl2, (Me4Si2)2(4-MePh2SiCH2Cp)2ZrCl2, (Et4Si2)2(4-MePh2SiCH2Cp)\2ZrCl2, (iPr4Si2)2(4-MePh2SiCH2Cp)2ZrCl2, (Ph4Si2)2(4-MePh2SiCH2Cp)2ZrCl2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)2ZrCl2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)2ZrCl2, (Me4Si2)2(4-Ph3SiCH2Cp)2ZrCl2, (Et4Si2)2(4-Ph3SiCH2Cp)2ZrCl2, (iPr4Si2)2(4-Ph3SiCH2Cp)2ZrCl2, (Ph4Si2)2(4-Ph3SiCH2Cp)2ZrCl2, ((MeMeSi)(PhPhSi))2(4-Ph3SiCH2Cp)2ZrCl2, ((MePhSi)(MePhSi))2(4-Ph3SiCH2Cp)2ZrCl2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrCl2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrCl2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrCl2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrCl2, (Me4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrCl2, (Et4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrCl2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrCl2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrCl2, (Me4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrCl2, (Et4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrCl2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrCl2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrCl2, (Me4Si2)2(2,3,4-Me3Cp)(4-Me2PhSiCH2Cp)ZrCl2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrCl2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrCl2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrCl2, (Me4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrCl2, (Et4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrCl2, (iPr4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrCl2, (Ph4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrCl2, (Me4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrCl2, (Et4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrCl2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrCl2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrCl2, (Me4Si2)2(Cp)(4-Me3SiCH2Cp)ZrCl2, (Et4Si2)2(Cp)(4-Me3SiCH2Cp)ZrCl2, (iPr4Si2)2(Cp)(4-Me3SiCH2Cp)ZrCl2, (Ph4Si2)2(Cp)(4-Me3SiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me3SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(Cp)(4-Me3SiCH2Cp)ZrCl2, (Me4Si2)2(Cp)(4-Et3SiCH2Cp)ZrCl2, (Et4Si2)2(Cp)(4-Et3SiCH2Cp)ZrCl2, (iPr4Si2)2(Cp)(4-Et3SiCH2Cp)ZrCl2, (Ph4Si2)2(Cp)(4-Et3SiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(Cp)(4-Et3SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(Cp)(4-Et3SiCH2Cp)ZrCl2, (Me4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrCl2, (Et4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrCl2, (iPr4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrCl2, (Ph4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(Cp)(4-Cy3SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(Cp)(4-Cy3SiCH2Cp)ZrCl2, (Me4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrCl2, (Et4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrCl2, (iPr4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrCl2, (Ph4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me2PhSiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(Cp)(4-Me2PhSiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(Cp)(4-MePh2SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(Cp)(4-MePh2SiCH2Cp)ZrCl2, (Me4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrCl2, (Et4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrCl2, (iPr4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrCl2, (Ph4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(Cp)(4-Ph3SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(Cp)(4-Ph3SiCH2Cp)ZrCl2, (Me4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrCl2, (Et4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrCl2, (iPr4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrCl2, (Ph4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrCl2, (Me4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrCl2, (Et4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrCl2, (iPr4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrCl2, (Ph4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrCl2, (Me4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrCl2, (Et4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrCl2, (iPr4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrCl2, (Ph4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrCl2, (Me4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrCl2, (Et4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrCl2, (iPr4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrCl2, (Ph4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrCl2, (Me4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrCl2, (Et4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrCl2, (iPr4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrCl2, (Ph4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrCl2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrCl2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrCl2, (Me4Si2)2(4-Ph3SiCH2Cp)2ZrCl2, (Et4Si2)2(4-Ph3SiCH2Cp)2ZrCl2, (iPr4Si2)2(4-Ph3SiCH2Cp)2ZrCl2, (Ph4Si2)2(4-Ph3SiCH2Cp)2ZrCl2, ((MeMeSi)(PhPhSi))2(1-Ph3SiCH2Cp)2ZrCl2, and ((MePhSi)(MePhSi))2(1-Ph3SiCH2Cp)2ZrCl2.

### Claim 28 (depends on 1)

The catalyst compound of claim 1, wherein the catalyst compound is selected from:
(Me4Si2)2(4-Me3SiCH2Cp)2ZrMe2, (Et4Si2)2(4-Me3SiCH2Cp)2ZrMe2, (iPr4Si2)2(4-Me3SiCH2Cp)2ZrMe2, (Ph4Si2)2(4-Me3SiCH2Cp)2ZrMe2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)2ZrMe2, (Me4Si2)2(4-Et3SiCH2Cp)2ZrMe2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)2ZrMe2, (Me4Si2)2(4-Et3SiCH2Cp)2ZrMe2, (Et4Si2)2(4-Et3SiCH2Cp)2ZrMe2, (iPr4Si2)2(4-Et3SiCH2Cp)2ZrMe2, (Ph4Si2)2(4-Et3SiCH2Cp)2ZrMe2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)2ZrMe2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)2ZrMe2, (Me4Si2)2(4-Cy3SiCH2Cp)2ZrMe2, (Et4Si2)2(4-Cy3SiCH2Cp)2ZrMe2, (iPr4Si2)2(4-Cy3SiCH2Cp)2ZrMe2, (Ph4Si2)2(4-Cy3SiCH2Cp)2ZrMe2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)2ZrMe2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)2ZrMe2, (Me4Si2)2(4-Me2PhSiCH2Cp)2ZrMe2, (Et4Si2)2(4-Me2PhSiCH2Cp)2ZrMe2, (iPr4Si2)2(4-Me2PhSiCH2Cp)2ZrMe2, (Ph4Si2)2(4-Me2PhSiCH2Cp)2ZrMe2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)2ZrMe2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)2ZrMe2, (Me4Si2)2(4-MePh2SiCH2Cp)2ZrMe2, (Et4Si2)2(4-MePh2SiCH2Cp)\2ZrMe2, (iPr4Si2)2(4-MePh2SiCH2Cp)2ZrMe2, (Ph4Si2)2(4-MePh2SiCH2Cp)2ZrMe2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)2ZrMe2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)2ZrMe2, (Me4Si2)2(4-Ph3SiCH2Cp)2ZrMe2, (Et4Si2)2(4-Ph3SiCH2Cp)2ZrMe2, (iPr4Si2)2(4-Ph3SiCH2Cp)2ZrMe2, (Ph4Si2)2(4-Ph3SiCH2Cp)2ZrMe2, ((MeMeSi)(PhPhSi))2(4-Ph3SiCH2Cp)2ZrMe2, ((MePhSi)(MePhSi))2(4-Ph3SiCH2Cp)2ZrMe2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrMe2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrMe2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrMe2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrMe2, (Me4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrMe2, (Et4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrMe2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrMe2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrMe2, (Me4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrMe2, (Et4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrMe2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrMe2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrMe2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrMe2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrMe2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrMe2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrMe2, (Me4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrMe2, (Et4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrMe2, (iPr4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrMe2, (Ph4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrMe2, (Me4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrMe2, (Et4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrMe2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrMe2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrMe2, (Me4Si2)2(Cp)(4-Me3SiCH2Cp)ZrMe2, (Et4Si2)2(Cp)(4-Me3SiCH2Cp)ZrMe2, (iPr4Si2)2(Cp)(4-Me3SiCH2Cp)ZrMe2, (Ph4Si2)2(Cp)(4-Me3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me3SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(Cp)(4-Me3SiCH2Cp)ZrMe2, (Me4Si2)2(Cp)(4-Et3SiCH2Cp)ZrMe2, (Et4Si2)2(Cp)(4-Et3SiCH2Cp)ZrMe2, (iPr4Si2)2(Cp)(4-Et3SiCH2Cp)ZrMe2, (Ph4Si2)2(Cp)(4-Et3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(Cp)(4-Et3SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(Cp)(4-Et3SiCH2Cp)ZrMe2, (Me4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrMe2, (Et4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrMe2, (iPr4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrMe2, (Ph4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(Cp)(4-Cy3SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(Cp)(4-Cy3SiCH2Cp)ZrMe2, (Me4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrMe2, (Et4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrMe2, (iPr4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrMe2, (Ph4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me2PhSiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(Cp)(4-Me2PhSiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(Cp)(4-MePh2SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(Cp)(4-MePh2SiCH2Cp)ZrMe2, (Me4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrMe2, (Et4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrMe2, (iPr4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrMe2, (Ph4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(Cp)(4-Ph3SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(Cp)(4-Ph3SiCH2Cp)ZrMe2, (Me4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrMe2, (Et4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrMe2, (iPr4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrMe2, (Ph4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrMe2, (Me4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrMe2, (Et4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrMe2, (iPr4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrMe2, (Ph4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrMe2, (Me4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrMe2, (Et4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrMe2, (iPr4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrMe2, (Ph4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrMe2, (Me4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrMe2, (Et4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrMe2, (iPr4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrMe2, (Ph4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrMe2, (Me4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrMe2, (Et4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrMe2, (iPr4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrMe2, (Ph4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrMe2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrMe2, (Me4Si2)2(4-Ph3SiCH2Cp)2ZrMe2, (Et4Si2)2(4-Ph3SiCH2Cp)2ZrMe2, (iPr4Si2)2(4-Ph3SiCH2Cp)2ZrMe2, (Ph4Si2)2(4-Ph3SiCH2Cp)2ZrMe2, ((MeMeSi)(PhPhSi))2(1-Ph3SiCH2Cp)2ZrMe2, and ((MePhSi)(MePhSi))2(1-Ph3SiCH2Cp)2ZrMe2.

### Claim 29 (depends on 1)

The catalyst compound of claim 1, wherein the catalyst compound is selected from:
(Me4Si2)2(4-Me3SiCH2Cp)2ZrBu2, (Et4Si2)2(4-Me3SiCH2Cp)2ZrBu2, (iPr4Si2)2(4-Me3SiCH2Cp)2ZrBu2, (Ph4Si2)2(4-Me3SiCH2Cp)2ZrBu2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)2ZrBu2, (Me4Si2)2(4-Et3SiCH2Cp)2ZrBu2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)2ZrBu2, (Me4Si2)2(4-Et3SiCH2Cp)2ZrBu2, (Et4Si2)2(4-Et3SiCH2Cp)2ZrBu2, (iPr4Si2)2(4-Et3SiCH2Cp)2ZrBu2, (Ph4Si2)2(4-Et3SiCH2Cp)2ZrBu2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)2ZrBu2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)2ZrBu2, (Me4Si2)2(4-Cy3SiCH2Cp)2ZrBu2, (Et4Si2)2(4-Cy3SiCH2Cp)2ZrBu2, (iPr4Si2)2(4-Cy3SiCH2Cp)2ZrBu2, (Ph4Si2)2(4-Cy3SiCH2Cp)2ZrBu2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)2ZrBu2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)2ZrBu2, (Me4Si2)2(4-Me2PhSiCH2Cp)2ZrBu2, (Et4Si2)2(4-Me2PhSiCH2Cp)2ZrBu2, (iPr4Si2)2(4-Me2PhSiCH2Cp)2ZrBu2, (Ph4Si2)2(4-Me2PhSiCH2Cp)2ZrBu2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)2ZrBu2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)2ZrBu2, (Me4Si2)2(4-MePh2SiCH2Cp)2ZrBu2, (Et4Si2)2(4-MePh2SiCH2Cp)\2ZrBu2, (iPr4Si2)2(4-MePh2SiCH2Cp)2ZrBu2, (Ph4Si2)2(4-MePh2SiCH2Cp)2ZrBu2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)2ZrBu2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)2ZrBu2, (Me4Si2)2(4-Ph3SiCH2Cp)2ZrBu2, (Et4Si2)2(4-Ph3SiCH2Cp)2ZrBu2, (iPr4Si2)2(4-Ph3SiCH2Cp)2ZrBu2, (Ph4Si2)2(4-Ph3SiCH2Cp)2ZrBu2, ((MeMeSi)(PhPhSi))2(4-Ph3SiCH2Cp)2ZrBu2, ((MePhSi)(MePhSi))2(4-Ph3SiCH2Cp)2ZrBu2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrBu2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrBu2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrBu2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrBu2, (Me4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrBu2, (Et4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrBu2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrBu2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrBu2, (Me4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrBu2, (Et4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrBu2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrBu2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrBu2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrBu2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrBu2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrBu2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrBu2, (Me4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrBu2, (Et4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrBu2, (iPr4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrBu2, (Ph4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrBu2, (Me4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrBu2, (Et4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrBu2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrBu2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrBu2, (Me4Si2)2(Cp)(4-Me3SiCH2Cp)ZrBu2, (Et4Si2)2(Cp)(4-Me3SiCH2Cp)ZrBu2, (iPr4Si2)2(Cp)(4-Me3SiCH2Cp)ZrBu2, (Ph4Si2)2(Cp)(4-Me3SiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me3SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(Cp)(4-Me3SiCH2Cp)ZrBu2, (Me4Si2)2(Cp)(4-Et3SiCH2Cp)ZrBu2, (Et4Si2)2(Cp)(4-Et3SiCH2Cp)ZrBu2, (iPr4Si2)2(Cp)(4-Et3SiCH2Cp)ZrBu2, (Ph4Si2)2(Cp)(4-Et3SiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(Cp)(4-Et3SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(Cp)(4-Et3SiCH2Cp)ZrBu2, (Me4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrBu2, (Et4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrBu2, (iPr4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrBu2, (Ph4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(Cp)(4-Cy3SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(Cp)(4-Cy3SiCH2Cp)ZrBu2, (Me4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrBu2, (Et4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrBu2, (iPr4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrBu2, (Ph4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me2PhSiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(Cp)(4-Me2PhSiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(Cp)(4-MePh2SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(Cp)(4-MePh2SiCH2Cp)ZrBu2, (Me4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrBu2, (Et4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrBu2, (iPr4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrBu2, (Ph4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(Cp)(4-Ph3SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(Cp)(4-Ph3SiCH2Cp)ZrBu2, (Me4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrBu2, (Et4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrBu2, (iPr4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrBu2, (Ph4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrBu2, (Me4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrBu2, (Et4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrBu2, (iPr4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrBu2, (Ph4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrBu2, (Me4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrBu2, (Et4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrBu2, (iPr4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrBu2, (Ph4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrBu2, (Me4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrBu2, (Et4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrBu2, (iPr4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrBu2, (Ph4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrBu2, (Me4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrBu2, (Et4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrBu2, (iPr4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrBu2, (Ph4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrBu2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrBu2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrBu2, (Me4Si2)2(4-Ph3SiCH2Cp)2ZrBu2, (Et4Si2)2(4-Ph3SiCH2Cp)2ZrBu2, (iPr4Si2)2(4-Ph3SiCH2Cp)2ZrBu2, (Ph4Si2)2(4-Ph3SiCH2Cp)2ZrBu2, ((MeMeSi)(PhPhSi))2(1-Ph3SiCH2Cp)2ZrBu2, and ((MePhSi)(MePhSi))2(1-Ph3SiCH2Cp)2ZrBu2.

### Claim 30 (depends on 1)

The catalyst compound of claim 1, wherein the catalyst compound is selected from:
(Me4Si2)2(4-Me3SiCH2Cp)2ZrPh2, (Et4Si2)2(4-Me3SiCH2Cp)2ZrPh2, (iPr4Si2)2(4-Me3SiCH2Cp)2ZrPh2, (Ph4Si2)2(4-Me3SiCH2Cp)2ZrPh2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)2ZrPh2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)2ZrPh2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)2ZrPh2, (Me4Si2)2(4-Et3SiCH2Cp)2ZrPh2, (Et4Si2)2(4-Et3SiCH2Cp)2ZrPh2, (iPr4Si2)2(4-Et3SiCH2Cp)2ZrPh2, (Ph4Si2)2(4-Et3SiCH2Cp)2ZrPh2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)2ZrPh2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)2ZrPh2, (Me4Si2)2(4-Cy3SiCH2Cp)2ZrPh2, (Et4Si2)2(4-Cy3SiCH2Cp)2ZrPh2, (iPr4Si2)2(4-Cy3SiCH2Cp)2ZrPh2, (Ph4Si2)2(4-Cy3SiCH2Cp)2ZrPh2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)2ZrPh2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)2ZrPh2, (Me4Si2)2(4-Me2PhSiCH2Cp)2ZrPh2, (Et4Si2)2(4-Me2PhSiCH2Cp)2ZrPh2, (iPr4Si2)2(4-Me2PhSiCH2Cp)2ZrPh2, (Ph4Si2)2(4-Me2PhSiCH2Cp)2ZrPh2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)2ZrPh2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)2ZrPh2, (Me4Si2)2(4-MePh2SiCH2Cp)2ZrPh2, (Et4Si2)2(4-MePh2SiCH2Cp)\2ZrPh2, (iPr4Si2)2(4-MePh2SiCH2Cp)2ZrPh2, (Ph4Si2)2(4-MePh2SiCH2Cp)2ZrPh2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)2ZrPh2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)2ZrPh2, (Me4Si2)2(4-Ph3SiCH2Cp)2ZrPh2, (Et4Si2)2(4-Ph3SiCH2Cp)2ZrPh2, (iPr4Si2)2(4-Ph3SiCH2Cp)2ZrPh2, (Ph4Si2)2(4-Ph3SiCH2Cp)2ZrPh2, ((MeMeSi)(PhPhSi))2(4-Ph3SiCH2Cp)2ZrPh2, ((MePhSi)(MePhSi))2(4-Ph3SiCH2Cp)2ZrPh2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrPh2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrPh2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrPh2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrPh2, (Me4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrPh2, (Et4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrPh2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrPh2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrPh2, (Me4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrPh2, (Et4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrPh2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrPh2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrPh2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrPh2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrPh2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrPh2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrPh2, (Me4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrPh2, (Et4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrPh2, (iPr4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrPh2, (Ph4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrPh2, (Me4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrPh2, (Et4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrPh2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrPh2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrPh2, (Me4Si2)2(Cp)(4-Me3SiCH2Cp)ZrPh2, (Et4Si2)2(Cp)(4-Me3SiCH2Cp)ZrPh2, (iPr4Si2)2(Cp)(4-Me3SiCH2Cp)ZrPh2, (Ph4Si2)2(Cp)(4-Me3SiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me3SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(Cp)(4-Me3SiCH2Cp)ZrPh2, (Me4Si2)2(Cp)(4-Et3SiCH2Cp)ZrPh2, (Et4Si2)2(Cp)(4-Et3SiCH2Cp)ZrPh2, (iPr4Si2)2(Cp)(4-Et3SiCH2Cp)ZrPh2, (Ph4Si2)2(Cp)(4-Et3SiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(Cp)(4-Et3SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(Cp)(4-Et3SiCH2Cp)ZrPh2, (Me4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrPh2, (Et4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrPh2, (iPr4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrPh2, (Ph4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(Cp)(4-Cy3SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(Cp)(4-Cy3SiCH2Cp)ZrPh2, (Me4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrPh2, (Et4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrPh2, (iPr4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrPh2, (Ph4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me2PhSiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(Cp)(4-Me2PhSiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(Cp)(4-MePh2SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(Cp)(4-MePh2SiCH2Cp)ZrPh2, (Me4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrPh2, (Et4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrPh2, (iPr4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrPh2, (Ph4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(Cp)(4-Ph3SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(Cp)(4-Ph3SiCH2Cp)ZrPh2, (Me4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrPh2, (Et4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrPh2, (iPr4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrPh2, (Ph4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrPh2, (Me4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrPh2, (Et4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrPh2, (iPr4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrPh2, (Ph4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrPh2, (Me4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrPh2, (Et4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrPh2, (iPr4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrPh2, (Ph4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrPh2, (Me4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrPh2, (Et4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrPh2, (iPr4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrPh2, (Ph4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrPh2, (Me4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrPh2, (Et4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrPh2, (iPr4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrPh2, (Ph4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrPh2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrPh2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrPh2, (Me4Si2)2(4-Ph3SiCH2Cp)2ZrPh2, (Et4Si2)2(4-Ph3SiCH2Cp)2ZrPh2, (iPr4Si2)2(4-Ph3SiCH2Cp)2ZrPh2, (Ph4Si2)2(4-Ph3SiCH2Cp)2ZrPh2, ((MeMeSi)(PhPhSi))2(1-Ph3SiCH2Cp)2ZrPh2, and ((MePhSi)(MePhSi))2(1-Ph3SiCH2Cp)2ZrPh2.

### Claim 31 (depends on 1)

The catalyst compound of claim 1, wherein the catalyst compound is selected from:
(Me4Si2)2(4-Me3SiCH2Cp)2ZrBn2, (Et4Si2)2(4-Me3SiCH2Cp)2ZrBn2, (iPr4Si2)2(4-Me3SiCH2Cp)2ZrBn2, (Ph4Si2)2(4-Me3SiCH2Cp)2ZrBn2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)2ZrBn2, (Me4Si2)2(4-Et3SiCH2Cp)2ZrBn2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)2ZrBn2, (Me4Si2)2(4-Et3SiCH2Cp)2ZrBn2, (Et4Si2)2(4-Et3SiCH2Cp)2ZrBn2, (iPr4Si2)2(4-Et3SiCH2Cp)2ZrBn2, (Ph4Si2)2(4-Et3SiCH2Cp)2ZrBn2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)2ZrBn2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)2ZrBn2, (Me4Si2)2(4-Cy3SiCH2Cp)2ZrBn2, (Et4Si2)2(4-Cy3SiCH2Cp)2ZrBn2, (iPr4Si2)2(4-Cy3SiCH2Cp)2ZrBn2, (Ph4Si2)2(4-Cy3SiCH2Cp)2ZrBn2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)2ZrBn2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)2ZrBn2, (Me4Si2)2(4-Me2PhSiCH2Cp)2ZrBn2, (Et4Si2)2(4-Me2PhSiCH2Cp)2ZrBn2, (iPr4Si2)2(4-Me2PhSiCH2Cp)2ZrBn2, (Ph4Si2)2(4-Me2PhSiCH2Cp)2ZrBn2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)2ZrBn2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)2ZrBn2, (Me4Si2)2(4-MePh2SiCH2Cp)2ZrBn2, (Et4Si2)2(4-MePh2SiCH2Cp)\2ZrBn2, (iPr4Si2)2(4-MePh2SiCH2Cp)2ZrBn2, (Ph4Si2)2(4-MePh2SiCH2Cp)2ZrBn2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)2ZrBn2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)2ZrBn2, (Me4Si2)2(4-Ph3SiCH2Cp)2ZrBn2, (Et4Si2)2(4-Ph3SiCH2Cp)2ZrBn2, (iPr4Si2)2(4-Ph3SiCH2Cp)2ZrBn2, (Ph4Si2)2(4-Ph3SiCH2Cp)2ZrBn2, ((MeMeSi)(PhPhSi))2(4-Ph3SiCH2Cp)2ZrBn2, ((MePhSi)(MePhSi))2(4-Ph3SiCH2Cp)2ZrBn2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrBn2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrBn2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrBn2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)ZrBn2, (Me4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrBn2, (Et4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrBn2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrBn2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)ZrBn2, (Me4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrBn2, (Et4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrBn2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrBn2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)ZrBn2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrBn2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrBn2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrBn2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)ZrBn2, (Me4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrBn2, (Et4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrBn2, (iPr4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrBn2, (Ph4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)ZrBn2, (Me4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrBn2, (Et4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrBn2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrBn2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)ZrBn2, (Me4Si2)2(Cp)(4-Me3SiCH2Cp)ZrBn2, (Et4Si2)2(Cp)(4-Me3SiCH2Cp)ZrBn2, (iPr4Si2)2(Cp)(4-Me3SiCH2Cp)ZrBn2, (Ph4Si2)2(Cp)(4-Me3SiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me3SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(Cp)(4-Me3SiCH2Cp)ZrBn2, (Me4Si2)2(Cp)(4-Et3SiCH2Cp)ZrBn2, (Et4Si2)2(Cp)(4-Et3SiCH2Cp)ZrBn2, (iPr4Si2)2(Cp)(4-Et3SiCH2Cp)ZrBn2, (Ph4Si2)2(Cp)(4-Et3SiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(Cp)(4-Et3SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(Cp)(4-Et3SiCH2Cp)ZrBn2, (Me4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrBn2, (Et4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrBn2, (iPr4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrBn2, (Ph4Si2)2(Cp)(4-Cy3SiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(Cp)(4-Cy3SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(Cp)(4-Cy3SiCH2Cp)ZrBn2, (Me4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrBn2, (Et4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrBn2, (iPr4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrBn2, (Ph4Si2)2(Cp)(4-Me2PhSiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me2PhSiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(Cp)(4-Me2PhSiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(Cp)(4-MePh2SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(Cp)(4-MePh2SiCH2Cp)ZrBn2, (Me4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrBn2, (Et4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrBn2, (iPr4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrBn2, (Ph4Si2)2(Cp)(4-Ph3SiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(Cp)(4-Ph3SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(Cp)(4-Ph3SiCH2Cp)ZrBn2, (Me4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrBn2, (Et4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrBn2, (iPr4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrBn2, (Ph4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)ZrBn2, (Me4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrBn2, (Et4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrBn2, (iPr4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrBn2, (Ph4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)ZrBn2, (Me4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrBn2, (Et4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrBn2, (iPr4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrBn2, (Ph4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)ZrBn2, (Me4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrBn2, (Et4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrBn2, (iPr4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrBn2, (Ph4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)ZrBn2, (Me4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrBn2, (Et4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrBn2, (iPr4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrBn2, (Ph4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrBn2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrBn2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)ZrBn2, (Me4Si2)2(4-Ph3SiCH2Cp)2ZrBn2, (Et4Si2)2(4-Ph3SiCH2Cp)2ZrBn2, (iPr4Si2)2(4-Ph3SiCH2Cp)2ZrBn2, (Ph4Si2)2(4-Ph3SiCH2Cp)2ZrBn2, ((MeMeSi)(PhPhSi))2(1-Ph3SiCH2Cp)2ZrBn2, and ((MePhSi)(MePhSi))2(1-Ph3SiCH2Cp)2ZrBn2.

### Claim 32 (depends on 1)

The catalyst compound of claim 1, wherein the catalyst compound is selected from:
(Me4Si2)2(4-Me3SiCH2Cp)2HfCl2, (Et4Si2)2(4-Me3SiCH2Cp)2HfCl2, (iPr4Si2)2(4-Me3SiCH2Cp)2HfCl2, (Ph4Si2)2(4-Me3SiCH2Cp)2HfCl2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)2HfCl2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)2HfCl2, (Me4Si2)2(4-Et3SiCH2Cp)2HfCl2, (Et4Si2)2(4-Et3SiCH2Cp)2HfCl2, (iPr4Si2)2(4-Et3SiCH2Cp)2HfCl2, (Ph4Si2)2(4-Et3SiCH2Cp)2HfCl2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)2HfCl2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)2HfCl2, (Me4Si2)2(4-Cy3SiCH2Cp)2HfCl2, (Et4Si2)2(4-Cy3SiCH2Cp)2HfCl2, (iPr4Si2)2(4-Cy3SiCH2Cp)2HfCl2, (Ph4Si2)2(4-Cy3SiCH2Cp)2HfCl2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)2HfCl2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)2HfCl2, (Me4Si2)2(4-Me2PhSiCH2Cp)2HfCl2, (Et4Si2)2(4-Me2PhSiCH2Cp)2HfCl2, (iPr4Si2)2(4-Me2PhSiCH2Cp)2HfCl2, (Ph4Si2)2(4-Me2PhSiCH2Cp)2HfCl2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)2HfCl2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)2HfCl2,(Me4Si2)2(4-MePh2SiCH2Cp)2HfCl2, (Et4Si2)2(4-MePh2SiCH2Cp)\2HfCl2, (iPr4Si2)2(4-MePh2SiCH2Cp)2HfCl2, (Ph4Si2)2(4-MePh2SiCH2Cp)2HfCl2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)2HfCl2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)2HfCl2, (Me4Si2)2(4-Ph3SiCH2Cp)2HfCl2, (Et4Si2)2(4-Ph3SiCH2Cp)2HfCl2, (iPr4Si2)2(4-Ph3SiCH2Cp)2HfCl2, (Ph4Si2)2(4-Ph3SiCH2Cp)2HfCl2, ((MeMeSi)(PhPhSi))2(4-Ph3SiCH2Cp)2HfCl2, ((MePhSi)(MePhSi))2(4-Ph3SiCH2Cp)2HfCl2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfCl2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfCl2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfCl2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfCl2, (Me4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfCl2, (Et4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfCl2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfCl2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfCl2, (Me4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfCl2, (Et4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfCl2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfCl2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfCl2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfCl2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfCl2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfCl2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfCl2, (Me4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfCl2, (Et4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfCl2, (iPr4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfCl2, (Ph4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfCl2, (Me4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfCl2, (Et4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfCl2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfCl2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfCl2, (Me4Si2)2(Cp)(4-Me3SiCH2Cp)HfCl2, (Et4Si2)2(Cp)(4-Me3SiCH2Cp)HfCl2, (iPr4Si2)2(Cp)(4-Me3SiCH2Cp)HfCl2, (Ph4Si2)2(Cp)(4-Me3SiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me3SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(Cp)(4-Me3SiCH2Cp)HfCl2, (Me4Si2)2(Cp)(4-Et3SiCH2Cp)HfCl2, (Et4Si2)2(Cp)(4-Et3SiCH2Cp)HfCl2, (iPr4Si2)2(Cp)(4-Et3SiCH2Cp)HfCl2, (Ph4Si2)2(Cp)(4-Et3SiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(Cp)(4-Et3SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(Cp)(4-Et3SiCH2Cp)HfCl2, (Me4Si2)2(Cp)(4-Cy3SiCH2Cp)HfCl2, (Et4Si2)2(Cp)(4-Cy3SiCH2Cp)HfCl2, (iPr4Si2)2(Cp)(4-Cy3SiCH2Cp)HfCl2, (Ph4Si2)2(Cp)(4-Cy3SiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(Cp)(4-Cy3SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(Cp)(4-Cy3SiCH2Cp)HfCl2, (Me4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfCl2, (Et4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfCl2, (iPr4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfCl2, (Ph4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me2PhSiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(Cp)(4-Me2PhSiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(Cp)(4-MePh2SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(Cp)(4-MePh2SiCH2Cp)HfCl2, (Me4Si2)2(Cp)(4-Ph3SiCH2Cp)HfCl2, (Et4Si2)2(Cp)(4-Ph3SiCH2Cp)HfCl2, (iPr4Si2)2(Cp)(4-Ph3SiCH2Cp)HfCl2, (Ph4Si2)2(Cp)(4-Ph3SiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(Cp)(4-Ph3SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(Cp)(4-Ph3SiCH2Cp)HfCl2, (Me4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfCl2, (Et4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfCl2, (iPr4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfCl2, (Ph4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfCl2, (Me4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfCl2, (Et4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfCl2, (iPr4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfCl2, (Ph4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfCl2, (Me4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfCl2, (Et4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfCl2, (iPr4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfCl2, (Ph4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfCl2, (Me4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfCl2, (Et4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfCl2, (iPr4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfCl2, (Ph4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfCl2, (Me4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfCl2, (Et4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfCl2, (iPr4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfCl2, (Ph4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfCl2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfCl2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfCl2, (Me4Si2)2(4-Ph3SiCH2Cp)2HfCl2, (Et4Si2)2(4-Ph3SiCH2Cp)2HfCl2, (iPr4Si2)2(4-Ph3SiCH2Cp)2HfCl2, (Ph4Si2)2(4-Ph3SiCH2Cp)2HfCl2, ((MeMeSi)(PhPhSi))2(1-Ph3SiCH2Cp)2HfCl2, and ((MePhSi)(MePhSi))2(1-Ph3SiCH2Cp)2HfCl2.

### Claim 33 (depends on 1)

The catalyst compound of claim 1, wherein the catalyst compound is selected from:
(Me4Si2)2(4-Me3SiCH2Cp)2HfMe2, (Et4Si2)2(4-Me3SiCH2Cp)2HfMe2, (iPr4Si2)2(4-Me3SiCH2Cp)2HfMe2, (Ph4Si2)2(4-Me3SiCH2Cp)2HfMe2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)2HfMe2, (Me4Si2)2(4-Et3SiCH2Cp)2HfMe2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)2HfMe2, (Me4Si2)2(4-Et3SiCH2Cp)2HfMe2, (Et4Si2)2(4-Et3SiCH2Cp)2HfMe2, (iPr4Si2)2(4-Et3SiCH2Cp)2HfMe2, (Ph4Si2)2(4-Et3SiCH2Cp)2HfMe2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)2HfMe2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)2HfMe2, (Me4Si2)2(4-Cy3SiCH2Cp)2HfMe2, (Et4Si2)2(4-Cy3SiCH2Cp)2HfMe2, (iPr4Si2)2(4-Cy3SiCH2Cp)2HfMe2, (Ph4Si2)2(4-Cy3SiCH2Cp)2HfMe2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)2HfMe2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)2HfMe2, (Me4Si2)2(4-Me2PhSiCH2Cp)2HfMe2, (Et4Si2)2(4-Me2PhSiCH2Cp)2HfMe2, (iPr4Si2)2(4-Me2PhSiCH2Cp)2HfMe2, (Ph4Si2)2(4-Me2PhSiCH2Cp)2HfMe2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)2HfMe2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)2HfMe2, (Me4Si2)2(4-MePh2SiCH2Cp)2HfMe2, (Et4Si2)2(4-MePh2SiCH2Cp)\2HfMe2, (iPr4Si2)2(4-MePh2SiCH2Cp)2HfMe2, (Ph4Si2)2(4-MePh2SiCH2Cp)2HfMe2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)2HfMe2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)2HfMe2, (Me4Si2)2(4-Ph3SiCH2Cp)2HfMe2, (Et4Si2)2(4-Ph3SiCH2Cp)2HfMe2, (iPr4Si2)2(4-Ph3SiCH2Cp)2HfMe2, (Ph4Si2)2(4-Ph3SiCH2Cp)2HfMe2, ((MeMeSi)(PhPhSi))2(4-Ph3SiCH2Cp)2HfMe2, ((MePhSi)(MePhSi))2(4-Ph3SiCH2Cp)2HfMe2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfMe2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfMe2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfMe2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfMe2, (Me4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfMe2, (Et4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfMe2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfMe2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfMe2, (Me4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfMe2, (Et4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfMe2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfMe2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfMe2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfMe2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfMe2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfMe2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfMe2, (Me4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfMe2, (Et4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfMe2, (iPr4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfMe2, (Ph4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfMe2, (Me4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfMe2, (Et4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfMe2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfMe2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfMe2, (Me4Si2)2(Cp)(4-Me3SiCH2Cp)HfMe2, (Et4Si2)2(Cp)(4-Me3SiCH2Cp)HfMe2, (iPr4Si2)2(Cp)(4-Me3SiCH2Cp)HfMe2, (Ph4Si2)2(Cp)(4-Me3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me3SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(Cp)(4-Me3SiCH2Cp)HfMe2, (Me4Si2)2(Cp)(4-Et3SiCH2Cp)HfMe2, (Et4Si2)2(Cp)(4-Et3SiCH2Cp)HfMe2, (iPr4Si2)2(Cp)(4-Et3SiCH2Cp)HfMe2, (Ph4Si2)2(Cp)(4-Et3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(Cp)(4-Et3SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(Cp)(4-Et3SiCH2Cp)HfMe2, (Me4Si2)2(Cp)(4-Cy3SiCH2Cp)HfMe2, (Et4Si2)2(Cp)(4-Cy3SiCH2Cp)HfMe2, (iPr4Si2)2(Cp)(4-Cy3SiCH2Cp)HfMe2, (Ph4Si2)2(Cp)(4-Cy3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(Cp)(4-Cy3SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(Cp)(4-Cy3SiCH2Cp)HfMe2, (Me4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfMe2, (Et4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfMe2, (iPr4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfMe2, (Ph4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me2PhSiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(Cp)(4-Me2PhSiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(Cp)(4-MePh2SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(Cp)(4-MePh2SiCH2Cp)HfMe2, (Me4Si2)2(Cp)(4-Ph3SiCH2Cp)HfMe2, (Et4Si2)2(Cp)(4-Ph3SiCH2Cp)HfMe2, (iPr4Si2)2(Cp)(4-Ph3SiCH2Cp)HfMe2, (Ph4Si2)2(Cp)(4-Ph3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(Cp)(4-Ph3SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(Cp)(4-Ph3SiCH2Cp)HfMe2, (Me4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfMe2, (Et4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfMe2, (iPr4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfMe2, (Ph4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfMe2, (Me4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfMe2, (Et4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfMe2, (iPr4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfMe2, (Ph4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfMe2, (Me4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfMe2, (Et4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfMe2, (iPr4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfMe2, (Ph4Si2)2(4-Cy3SiCH2Cp) (4-Me2PhSiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfMe2, (Me4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfMe2, (Et4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfMe2, (iPr4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfMe2, (Ph4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfMe2, (Me4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfMe2, (Et4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfMe2, (iPr4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfMe2, (Ph4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfMe2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfMe2, (Me4Si2)2(4-Ph3SiCH2Cp)2HfMe2, (Et4Si2)2(4-Ph3SiCH2Cp)2HfMe2, (iPr4Si2)2(4-Ph3SiCH2Cp)2HfMe2, (Ph4Si2)2(4-Ph3SiCH2Cp)2HfMe2, ((MeMeSi)(PhPhSi))2(1-Ph3SiCH2Cp)2HfMe2, and ((MePhSi)(MePhSi))2(1-Ph3SiCH2Cp)2HfMe2.

### Claim 34 (depends on 1)

The catalyst compound of claim 1, wherein the catalyst compound is selected from:
(Me4Si2)2(4-Me3SiCH2Cp)2HfBu2, (Et4Si2)2(4-Me3SiCH2Cp)2HfBu2, (iPr4Si2)2(4-Me3SiCH2Cp)2HfBu2, (Ph4Si2)2(4-Me3SiCH2Cp)2HfBu2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)2HfBu2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)2HfBu2, (Me4Si2)2(4-Et3SiCH2Cp)2HfBu2, (Et4Si2)2(4-Et3SiCH2Cp)2HfBu2, (iPr4Si2)2(4-Et3SiCH2Cp)2HfBu2, (Ph4Si2)2(4-Et3SiCH2Cp)2HfBu2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)2HfBu2, ((MePhSi) (MePhSi)2(4-Et3SiCH2Cp)2HfBu2, (Me4Si2)2(4-Cy3SiCH2Cp)2HfBu2, (Et4Si2)2(4-Cy3SiCH2Cp)2HfBu2, (iPr4Si2)2(4-Cy3SiCH2Cp)2HfBu2, (Ph4Si2)2(4-Cy3SiCH2Cp)2HfBu2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)2HfBu2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)2HfBu2, (Me4Si2)2(4-Me2PhSiCH2Cp)2HfBu2, (Et4Si2)2(4-Me2PhSiCH2Cp)2HfBu2, (iPr4Si2)2(4-Me2PhSiCH2Cp)2HfBu2, (Ph4Si2)2(4-Me2PhSiCH2Cp)2HfBu2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)2HfBu2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)2HfBu2, (Me4Si2)2(4-MePh2SiCH2Cp)2HfBu2, (Et4Si2)2(4-MePh2SiCH2Cp)\2HfBu2, (iPr4Si2)2(4-MePh2SiCH2Cp)2HfBu2, (Ph4Si2)2(4-MePh2SiCH2Cp)2HfBu2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)2HfBu2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)2HfBu2, (Me4Si2)2(4-Ph3SiCH2Cp)2HfBu2, (Et4Si2)2(4-Ph3SiCH2Cp)2HfBu2, (iPr4Si2)2(4-Ph3SiCH2Cp)2HfBu2, (Ph4Si2)2(4-Ph3SiCH2Cp)2HfBu2, ((MeMeSi)(PhPhSi))2(4-Ph3SiCH2Cp)2HfBu2, ((MePhSi)(MePhSi))2(4-Ph3SiCH2Cp)2HfBu2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfBu2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfBu2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfBu2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfBu2, (Me4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfBu2, (Et4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfBu2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfBu2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfBu2, (Me4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfBu2, (Et4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfBu2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfBu2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfBu2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfBu2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfBu2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfBu2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfBu2, (Me4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfBu2, (Et4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfBu2, (iPr4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfBu2, (Ph4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfBu2, (Me4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfBu2, (Et4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfBu2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfBu2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfBu2, (Me4Si2)2(Cp)(4-Me3SiCH2Cp)HfBu2, (Et4Si2)2(Cp)(4-Me3SiCH2Cp)HfBu2, (iPr4Si2)2(Cp)(4-Me3SiCH2Cp)HfBu2, (Ph4Si2)2(Cp)(4-Me3SiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me3SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(Cp)(4-Me3SiCH2Cp)HfBu2, (Me4Si2)2(Cp)(4-Et3SiCH2Cp)HfBu2, (Et4Si2)2(Cp)(4-Et3SiCH2Cp)HfBu2, (iPr4Si2)2(Cp)(4-Et3SiCH2Cp)HfBu2, (Ph4Si2)2(Cp)(4-Et3SiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(Cp)(4-Et3SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(Cp)(4-Et3SiCH2Cp)HfBu2, (Me4Si2)2(Cp)(4-Cy3SiCH2Cp)HfBu2, (Et4Si2)2(Cp)(4-Cy3SiCH2Cp)HfBu2, (iPr4Si2)2(Cp)(4-Cy3SiCH2Cp)HfBu2, (Ph4Si2)2(Cp)(4-Cy3SiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(Cp)(4-Cy3SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(Cp)(4-Cy3SiCH2Cp)HfBu2, (Me4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfBu2, (Et4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfBu2, (iPr4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfBu2, (Ph4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me2PhSiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(Cp)(4-Me2PhSiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(Cp)(4-MePh2SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(Cp)(4-MePh2SiCH2Cp)HfBu2, (Me4Si2)2(Cp)(4-Ph3SiCH2Cp)HfBu2, (Et4Si2)2(Cp)(4-Ph3SiCH2Cp)HfBu2, (iPr4Si2)2(Cp)(4-Ph3SiCH2Cp)HfBu2, (Ph4Si2)2(Cp)(4-Ph3SiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(Cp)(4-Ph3SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(Cp)(4-Ph3SiCH2Cp)HfBu2, (Me4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfBu2, (Et4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfBu2, (iPr4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfBu2, (Ph4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfBu2, (Me4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfBu2, (Et4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfBu2, (iPr4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfBu2, (Ph4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfBu2, (Me4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfBu2, (Et4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfBu2, (iPr4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfBu2, (Ph4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfBu2, (Me4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfBu2, (Et4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfBu2, (iPr4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfBu2, (Ph4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfBu2, (Me4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfBu2, (Et4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfBu2, (iPr4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfBu2, (Ph4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfBu2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfBu2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfBu2, (Me4Si2)2(4-Ph3SiCH2Cp)2HfBu2, (Et4Si2)2(4-Ph3SiCH2Cp)2HfBu2, (iPr4Si2)2(4-Ph3SiCH2Cp)2HfBu2, (Ph4Si2)2(4-Ph3SiCH2Cp)2HfBu2, ((MeMeSi)(PhPhSi))2(1-Ph3SiCH2Cp)2HfBu2, and ((MePhSi)(MePhSi))2(1-Ph3SiCH2Cp)2HfBu2.

### Claim 35 (depends on 1)

The catalyst compound of claim 1, wherein the catalyst compound is selected from:
(Me4Si2)2(4-Me3SiCH2Cp)2HfPh2, (Et4Si2)2(4-Me3SiCH2Cp)2HfPh2, (iPr4Si2)2(4-Me3SiCH2Cp)2HfPh2, (Ph4Si2)2(4-Me3SiCH2Cp)2HfPh2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)2HfPh2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)2HfPh2, (Me4Si2)2(4-Et3SiCH2Cp)2HfPh2, (Et4Si2)2(4-Et3SiCH2Cp)2HfPh2, (iPr4Si2)2(4-Et3SiCH2Cp)2HfPh2, (Ph4Si2)2(4-Et3SiCH2Cp)2HfPh2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)2HfPh2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)2HfPh2, (Me4Si2)2(4-Cy3SiCH2Cp)2HfPh2, (Et4Si2)2(4-Cy3SiCH2Cp)2HfPh2, (iPr4Si2)2(4-Cy3SiCH2Cp)2HfPh2, (Ph4Si2)2(4-Cy3SiCH2Cp)2HfPh2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)2HfPh2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)2HfPh2, (Me4Si2)2(4-Me2PhSiCH2Cp)2HfPh2, (Et4Si2)2(4-Me2PhSiCH2Cp)2HfPh2, (iPr4Si2)2(4-Me2PhSiCH2Cp)2HfPh2, (Ph4Si2)2(4-Me2PhSiCH2Cp)2HfPh2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)2HfPh2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)2HfPh2, (Me4Si2)2(4-MePh2SiCH2Cp)2HfPh2, (Et4Si2)2(4-MePh2SiCH2Cp)\2HfPh2, (iPr4Si2)2(4-MePh2SiCH2Cp)2HfPh2, (Ph4Si2)2(4-MePh2SiCH2Cp)2HfPh2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)2HfPh2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)2HfPh2, (Me4Si2)2(4-Ph3SiCH2Cp)2HfPh2, (Et4Si2)2(4-Ph3SiCH2Cp)2HfPh2, (iPr4Si2)2(4-Ph3SiCH2Cp)2HfPh2, (Ph4Si2)2(4-Ph3SiCH2Cp)2HfPh2, ((MeMeSi)(PhPhSi))2(4-Ph3SiCH2Cp)2HfPh2, ((MePhSi)(MePhSi))2(4-Ph3SiCH2Cp)2HfPh2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfPh2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfPh2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfPh2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfPh2, (Me4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfPh2, (Et4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfPh2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfPh2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfPh2, (Me4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfPh2, (Et4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfPh2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfPh2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfPh2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfPh2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfPh2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfPh2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfPh2, (Me4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfPh2, (Et4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfPh2, (iPr4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfPh2, (Ph4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfPh2, (Me4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfPh2, (Et4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfPh2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfPh2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfPh2, (Me4Si2)2(Cp)(4-Me3SiCH2Cp)HfPh2, (Et4Si2)2(Cp)(4-Me3SiCH2Cp)HfPh2, (iPr4Si2)2(Cp)(4-Me3SiCH2Cp)HfPh2, (Ph4Si2)2(Cp)(4-Me3SiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me3SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(Cp)(4-Me3SiCH2Cp)HfPh2, (Me4Si2)2(Cp)(4-Et3SiCH2Cp)HfPh2, (Et4Si2)2(Cp)(4-Et3SiCH2Cp)HfPh2, (iPr4Si2)2(Cp)(4-Et3SiCH2Cp)HfPh2, (Ph4Si2)2(Cp)(4-Et3SiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(Cp)(4-Et3SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(Cp)(4-Et3SiCH2Cp)HfPh2, (Me4Si2)2(Cp)(4-Cy3SiCH2Cp)HfPh2, (Et4Si2)2(Cp)(4-Cy3SiCH2Cp)HfPh2, (iPr4Si2)2(Cp)(4-Cy3SiCH2Cp)HfPh2, (Ph4Si2)2(Cp)(4-Cy3SiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(Cp)(4-Cy3SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(Cp)(4-Cy3SiCH2Cp)HfPh2, (Me4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfPh2, (Et4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfPh2, (iPr4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfPh2, (Ph4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me2PhSiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(Cp)(4-Me2PhSiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(Cp)(4-MePh2SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(Cp)(4-MePh2SiCH2Cp)HfPh2, (Me4Si2)2(Cp)(4-Ph3SiCH2Cp)HfPh2, (Et4Si2)2(Cp)(4-Ph3SiCH2Cp)HfPh2, (iPr4Si2)2(Cp)(4-Ph3SiCH2Cp)HfPh2, (Ph4Si2)2(Cp)(4-Ph3SiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(Cp)(4-Ph3SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(Cp)(4-Ph3SiCH2Cp)HfPh2, (Me4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfPh2, (Et4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfPh2, (iPr4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfPh2, (Ph4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfPh2, (Me4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfPh2, (Et4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfPh2, (iPr4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfPh2, (Ph4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfPh2, (Me4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfPh2, (Et4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfPh2, (iPr4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfPh2, (Ph4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfPh2, (Me4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfPh2, (Et4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfPh2, (iPr4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfPh2, (Ph4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfPh2, (Me4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfPh2, (Et4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfPh2, (iPr4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfPh2, (Ph4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfPh2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfPh2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfPh2, (Me4Si2)2(4-Ph3SiCH2Cp)2HfPh2, (Et4Si2)2(4-Ph3SiCH2Cp)2HfPh2, (iPr4Si2)2(4-Ph3SiCH2Cp)2HfPh2, (Ph4Si2)2(4-Ph3SiCH2Cp)2HfPh2, ((MeMeSi)(PhPhSi))2(1-Ph3SiCH2Cp)2HfPh2, and ((MePhSi)(MePhSi))2(1-Ph3SiCH2Cp)2HfPh2.

### Claim 36 (depends on 1)

The catalyst compound of claim 1, wherein the catalyst compound is selected from:
(Me4Si2)2(4-Me3SiCH2Cp)2HfBn2, (Et4Si2)2(4-Me3SiCH2Cp)2HfBn2, (iPr4Si2)2(4-Me3SiCH2Cp)2HfBn2, (Ph4Si2)2(4-Me3SiCH2Cp)2HfBn2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)2HfBn2, (Me4Si2)2(4-Et3SiCH2Cp)2HfBn2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)2HfBn2, (Me4Si2)2(4-Et3SiCH2Cp)2HfBn2, (Et4Si2)2(4-Et3SiCH2Cp)2HfBn2, (iPr4Si2)2(4-Et3SiCH2Cp)2HfBn2, (Ph4Si2)2(4-Et3SiCH2Cp)2HfBn2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)2HfBn2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)2HfBn2, (Me4Si2)2(4-Cy3SiCH2Cp)2HfBn2, (Et4Si2)2(4-Cy3SiCH2Cp)2HfBn2, (iPr4Si2)2(4-Cy3SiCH2Cp)2HfBn2, (Ph4Si2)2(4-Cy3SiCH2Cp)2HfBn2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)2HfBn2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)2HfBn2, (Me4Si2)2(4-Me2PhSiCH2Cp)2HfBn2, (Et4Si2)2(4-Me2PhSiCH2Cp)2HfBn2, (iPr4Si2)2(4-Me2PhSiCH2Cp)2HfBn2, (Ph4Si2)2(4-Me2PhSiCH2Cp)2HfBn2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)2HfBn2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)2HfBn2, (Me4Si2)2(4-MePh2SiCH2Cp)2HfBn2, (Et4Si2)2(4-MePh2SiCH2Cp)\2HfBn2, (iPr4Si2)2(4-MePh2SiCH2Cp)2HfBn2, (Ph4Si2)2(4-MePh2SiCH2Cp)2HfBn2, ((MeMeSi)(PhPhSi))2(4-MePh2SiCH2Cp)2HfBn2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)2HfBn2, (Me4Si2)2(4-Ph3SiCH2Cp)2HfBn2, (Et4Si2)2(4-Ph3SiCH2Cp)2HfBn2, (iPr4Si2)2(4-Ph3SiCH2Cp)2HfBn2, (Ph4Si2)2(4-Ph3SiCH2Cp)2HfBn2, ((MeMeSi)(PhPhSi))2(4-Ph3SiCH2Cp)2HfBn2, ((MePhSi)(MePhSi))2(4-Ph3SiCH2Cp)2HfBn2, (Me4Si2)2(3,4,5-Me3Cp) (4-Me3SiCH2Cp)HfBn2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfBn2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfBn2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me3SiCH2Cp)HfBn2, (Me4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfBn2, (Et4Si2)2(3,4,5-Me3Cp) (4-Et3SiCH2Cp)HfBn2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfBn2, (Ph4Si2)2(3,4,5-Me3Cp) (4-Et3SiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Et3SiCH2Cp)HfBn2, (Me4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfBn2, (Et4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfBn2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfBn2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfMe2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Cy3SiCH2Cp)HfBn2, (Me4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfBn2, (Et4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfBn2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfBn2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Me2PhSiCH2Cp)HfBn2, (Me4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfBn2, (Et4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfBn2, (iPr4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfBn2, (Ph4Si2)2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-MePh2SiCH2Cp)HfBn2, (Me4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfBn2, (Et4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfBn2, (iPr4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfBn2, (Ph4Si2)2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(3,4,5-Me3Cp)(4-Ph3SiCH2Cp)HfBn2, (Me4Si2)2(Cp)(4-Me3SiCH2Cp)HfBn2, (Et4Si2)2(Cp)(4-Me3SiCH2Cp)HfBn2, (iPr4Si2)2(Cp)(4-Me3SiCH2Cp)HfBn2, (Ph4Si2)2(Cp)(4-Me3SiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me3SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(Cp)(4-Me3SiCH2Cp)HfBn2, (Me4Si2)2(Cp)(4-Et3SiCH2Cp)HfBn2, (Et4Si2)2(Cp)(4-Et3SiCH2Cp)HfBn2, (iPr4Si2)2(Cp)(4-Et3SiCH2Cp)HfBn2, (Ph4Si2)2(Cp)(4-Et3SiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(Cp)(4-Et3SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(Cp)(4-Et3SiCH2Cp)HfBn2, (Me4Si2)2(Cp)(4-Cy3SiCH2Cp)HfBn2, (Et4Si2)2(Cp)(4-Cy3SiCH2Cp)HfBn2, (iPr4Si2)2(Cp)(4-Cy3SiCH2Cp)HfBn2, (Ph4Si2)2(Cp)(4-Cy3SiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(Cp)(4-Cy3SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(Cp)(4-Cy3SiCH2Cp)HfBn2, (Me4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfBn2, (Et4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfBn2, (iPr4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfBn2, (Ph4Si2)2(Cp)(4-Me2PhSiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(Cp)(4-Me2PhSiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(Cp)(4-Me2PhSiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(Cp)(4-MePh2SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(Cp)(4-MePh2SiCH2Cp)HfBn2, (Me4Si2)2(Cp)(4-Ph3SiCH2Cp)HfBn2, (Et4Si2)2(Cp)(4-Ph3SiCH2Cp)HfBn2, (iPr4Si2)2(Cp)(4-Ph3SiCH2Cp)HfBn2, (Ph4Si2)2(Cp)(4-Ph3SiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(Cp)(4-Ph3SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(Cp)(4-Ph3SiCH2Cp)HfBn2, (Me4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfBn2, (Et4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfBn2, (iPr4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfBn2, (Ph4Si2)2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(4-Me3SiCH2Cp)(4-Et3SiCH2Cp)HfBn2, (Me4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfBn2, (Et4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfBn2, (iPr4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfBn2, (Ph4Si2)2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(4-Et3SiCH2Cp)(4-Cy3SiCH2Cp)HfBn2, (Me4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfBn2, (Et4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfBn2, (iPr4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfBn2, (Ph4Si2)2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(4-Cy3SiCH2Cp)(4-Me2PhSiCH2Cp)HfBn2, (Me4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfBn2, (Et4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfBn2, (iPr4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfBn2, (Ph4Si2)2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfBn2, ((MeMeSi)(PhPhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(4-Me2PhSiCH2Cp)(4-MePh2SiCH2Cp)HfBn2, (Me4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfBn2, (Et4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfBn2, (iPr4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfBn2, (Ph4Si2)2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfBn2, ((MeMeSi) (PhPhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfBn2, ((MePhSi)(MePhSi))2(4-MePh2SiCH2Cp)(4-Ph3SiCH2Cp)HfBn2, (Me4Si2)2(4-Ph3SiCH2Cp)2HfBn2, (Et4Si2)2(4-Ph3SiCH2Cp)2HfBn2, (iPr4Si2)2(4-Ph3SiCH2Cp)2HfBn2, (Ph4Si2)2(4-Ph3SiCH2Cp)2HfBn2, ((MeMeSi)(PhPhSi))2(1-Ph3SiCH2Cp)2HfBn2, and ((MePhSi)(MePhSi))2(1-Ph3SiCH2Cp)2HfBn2.

### Claim 37 (depends on 1)

A catalyst system comprising an activator and the catalyst compound of claim 1.

### Claim 38 (depends on 37)

The catalyst system of claim 37, further comprising a support material.

### Claim 39 (depends on 38)

The catalyst system of claim 38, wherein the support material is selected from Al2O3, ZrO2, SiO2, SiO2/Al2O3, SiO2/TiO2, silica clay, silicon oxide/clay, or mixtures thereof.

### Claim 40 (depends on 37)

The catalyst system of claim 37, wherein the activator comprises a non-coordinating anion activator.

### Claim 41 (depends on 40)

The catalyst system of claim 40, wherein the activator is represented by the formula:
(Z)d+ (Ad−)
wherein Z is (L-H) or a reducible Lewis Acid, L is a Lewis base; H is hydrogen; (L-H)+ is a Bronsted acid; Ad− is a non-coordinating anion having the charge d−; and d is an integer from 1 to 3.

### Claim 42 (depends on 41)

The catalyst system of claim 41, wherein the activator is represented by the formula:
(Z)d+ (Ad−)
wherein Ad− is a non-coordinating anion having the charge d−; d is an integer from 1 to 3, and Z is a reducible Lewis acid represented by the formula: (Ar3C+), where Ar is aryl or aryl substituted with a heteroatom, a C1 to C40 hydrocarbyl, or a substituted C1 to C40 hydrocarbyl.

### Claim 43 (depends on 40)

The catalyst system of claim 40, wherein the activator is one or more of:
N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate,
dioctadecylmethylammonium tetrakis(pentafluorophenyl)borate,
dioctadecylmethylammonium tetrakis(perfluoronaphthyl)borate,
triphenylcarbenium tetrakis(pentafluorophenyl)borate,
trimethylammonium tetrakis(perfluoronaphthyl)borate,
triethylammonium tetrakis(perfluoronaphthyl)borate,
tripropylammonium tetrakis(perfluoronaphthyl)borate,
tri(n-butyl)ammonium tetrakis(perfluoronaphthyl)borate,
tri(t-butyl)ammonium tetrakis(perfluoronaphthyl)borate,
N,N-dimethylanilinium tetrakis(perfluoronaphthyl)borate,
N,N-diethylanilinium tetrakis(perfluoronaphthyl)borate,
N,N-dimethyl-(2,4,6-trimethylanilinium) tetrakis(perfluoronaphthyl)borate,
tropillium tetrakis(perfluoronaphthyl)borate,
triphenylcarbenium tetrakis(perfluoronaphthyl)borate,
triphenylphosphonium tetrakis(perfluoronaphthyl)borate,
triethylsilylium tetrakis(perfluoronaphthyl)borate,
benzene(diazonium) tetrakis(perfluoronaphthyl)borate,
trimethylammonium tetrakis(perfluorobiphenyl)borate,
triethylammonium tetrakis(perfluorobiphenyl)borate,
tripropylammonium tetrakis(perfluorobiphenyl)borate,
tri(n-butyl)ammonium tetrakis(perfluorobiphenyl)borate,
tri(t-butyl)ammonium tetrakis(perfluorobiphenyl)borate,
N,N-dimethylanilinium tetrakis(perfluorobiphenyl)borate,
N,N-diethylanilinium tetrakis(perfluorobiphenyl)borate,
N,N-dimethyl-(2,4,6-trimethylanilinium) tetrakis(perfluorobiphenyl)borate,
tropillium tetrakis(perfluorobiphenyl)borate,
triphenylcarbenium tetrakis(perfluorobiphenyl)borate,
triphenylphosphonium tetrakis(perfluorobiphenyl)borate,
triethylsilylium tetrakis(perfluorobiphenyl)borate,
benzene(diazonium) tetrakis(perfluorobiphenyl)borate,
[4-t-butyl-PhNMe2H][(C6F3(C6F5)2)4B],
trimethylammonium tetraphenylborate,
triethylammonium tetraphenylborate,
tripropylammonium tetraphenylborate,
tri(n-butyl)ammonium tetraphenylborate,
tri(t-butyl)ammonium tetraphenylborate,
N,N-dimethylanilinium tetraphenylborate,
N,N-diethylanilinium tetraphenylborate,
N,N-dimethyl-(2,4,6-trimethylanilinium) tetraphenylborate,
tropillium tetraphenylborate,
triphenylcarbenium tetraphenylborate,
triphenylphosphonium tetraphenylborate,
triethylsilylium tetraphenylborate,
benzene(diazonium)tetraphenylborate,
trimethylammonium tetrakis(pentafluorophenyl)borate,
triethylammonium tetrakis(pentafluorophenyl)borate,
tripropylammonium tetrakis(pentafluorophenyl)borate,
tri(n-butyl)ammonium tetrakis(pentafluorophenyl)borate,
tri(sec-butyl)ammonium tetrakis(pentafluorophenyl)borate,
N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate,
N,N-diethylanilinium tetrakis(pentafluorophenyl)borate,
N,N-dimethyl-(2,4,6-trimethylanilinium) tetrakis(pentafluorophenyl)borate,
tropillium tetrakis(pentafluorophenyl)borate,
triphenylcarbenium tetrakis(pentafluorophenyl)borate,
triphenylphosphonium tetrakis(pentafluorophenyl)borate,
triethylsilylium tetrakis(pentafluorophenyl)borate,
benzene(diazonium) tetrakis(pentafluorophenyl)borate,
trimethylammonium tetrakis-(2,3,4,6-tetrafluorophenyl) borate,
triethylammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,
tripropylammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,
tri(n-butyl)ammonium tetrakis-(2,3,4,6-tetrafluoro-phenyl)borate,
dimethyl(t-butyl)ammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,
N,N-dimethylanilinium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,
N,N-diethylanilinium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,
N,N-dimethyl-(2,4,6-trimethylanilinium) tetrakis-(2,3,4,6-tetrafluorophenyl)borate,
tropillium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,
triphenylcarbenium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,
triphenylphosphonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,
triethylsilylium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,
benzene(diazonium) tetrakis-(2,3,4,6-tetrafluorophenyl)borate,
trimethylammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
triethylammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
tripropylammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
tri(n-butyl)ammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
tri(t-butyl)ammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
N,N-dimethylanilinium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
N,N-diethylanilinium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
N,N-dimethyl-(2,4,6-trimethylanilinium) tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
tropillium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
triphenylcarbenium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
triphenylphosphonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
triethylsilylium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
benzene(diazonium) tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,
di-(i-propyl)ammonium tetrakis(pentafluorophenyl)borate,
dicyclohexylammonium tetrakis(pentafluorophenyl)borate,
tri(o-tolyl)phosphonium tetrakis(pentafluorophenyl)borate,
tri(2,6-dimethylphenyl)phosphonium tetrakis(pentafluorophenyl)borate,
triphenylcarbenium tetrakis(perfluorophenyl)borate,
1-(4-(tris(pentafluorophenyl)borate)-2,3,5,6-tetrafluorophenyl)pyrrolidinium,
tetrakis(pentafluorophenyl)borate,
4-(tris(pentafluorophenyl)borate)-2,3,5,6-tetrafluoropyridine, and
triphenylcarbenium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate).

### Claim 44 (depends on 37)

The catalyst system of claim 37, further comprising a metal hydrocarbenyl chain transfer agent represented by the formula:
Al(R′)3-v(R″)v
wherein each R′ independently is a C1-C30 hydrocarbyl group; each R″, independently, is a C4-C20 hydrocarbenyl group having an end-vinyl group; and v is from 0.1 to 3.

### Claim 45 (depends on 37)

The catalyst system of claim 37, wherein the activator comprises an alkylalumoxane.

### Claim 46 (depends on 45)

The catalyst system of claim 45, wherein the alumoxane is present at a molar ratio of aluminum to catalyst compound transition metal of 100:1 or more.

### Claim 47 (depends on 38)

A process for the production of an ethylene alpha-olefin copolymer comprising: polymerizing ethylene and at least one C3-C20 alpha-olefin by contacting the ethylene and the at least one C3-C20 alpha-olefin with a catalyst system of claim 38 in at least one gas phase reactor at a reactor pressure of from 0.7 bar to 70 bar and a reactor temperature of from 20° C. to 150° C. to form an ethylene alpha-olefin copolymer.