Back to results
US 6,284,905 B1Granted
Bridged metal complexes
AssigneesThe Dow Chemical Company, The Regents of the University of Michigan
InventorsArthur J. Ashe, III, David D. Devore, Xinggao Fang, Kevin A. Frazier, D. Patrick Green, Jasson T. Patton, Francis J. Timmers
Life of this patent
Estimating the term…
Abstract
A Group 4 transition metal complex containing a boron or aluminum bridging group containing a nitrogen containing electron donating group, especially an amido group.
Claims47
A Group 4 transition metal complex corresponding to the following formula:
- wherein:
- M is titanium, zirconium, or hafnium in the +4, +3, or +2 oxidation state;
- Y1 and Y2 are independently an anionic, cyclic or non-cyclic, π-bonded group, NR1, PR1;
- NR12 or PR12;
- Z is boron or aluminum;
- Q is a neutral, anionic or dianionic ligand group depending on the oxidation state of M;
- j is 1, 2 or 3 depending on the oxidation state of M and the electronic nature of Q;
- T independently each occurrence is:
- R1 is independently each occurrence hydrogen, a hydrocarbyl group, a tri(hydrocarbyl)silyl group, or a tri(hydrocarbyl)silylhydrocarbyl group, said R1 groups containing up to 20 atoms not counting hydrogen;
- R5 is R1 or N(R1)2;
- and
- two R1 groups together or one or more R1 groups together with R5 may optionally be joined to form a ring structure.
9 more elements
A Group 4 transition metal complex corresponding to the following formula:
- wherein:
- M is titanium, zirconium, or hafnium in the +4 oxidation state;
- Y1 and Y2 are independently an anionic, cyclic or non-cyclic, π-bonded group, NR1 or PR1;
- Z is boron or aluminum;
- Q is an anionic or dianionic ligand group;
- j is 1 or 2;
- T independently each occurrence is:
- R1 is independently each occurrence hydrogen, a hydrocarbyl group, a tri(hydrocarbyl)silyl group, or a tri(hydrocarbyl)silylhydrocarbyl group, said R1 groups containing up to 20 atoms not counting hydrogen;
- R5 is R1 or N(R1)2;
- and
- two R1 groups in T together or one or more R1 groups in T together with R5 may optionally be joined to form a ring structure.
8 more elements
A Group 4 transition metal complex corresponding to the following formula:
- wherein:
- M is titanium, zirconium, or hafnium in the +3, or +2 oxidation state;
- Y1 and Y2 are independently an anionic, cyclic or non-cyclic, π-bonded group, NR1, PR1;
- NR12 or PR12;
- Z is boron or aluminum;
- Q is a neutral ligand group or an anionic ligand group depending on the oxidation state of M;
- j is 1 or 2;
- T independently each occurrence is:
- R1 is independently each occurrence hydrogen, a hydrocarbyl group, a tri(hydrocarbyl)silyl group, or a tri(hydrocarbyl)silylhydrocarbyl group, said R1 groups containing up to 20 atoms not counting hydrogen;
- R5 is R1 or N(R1)2;
- and
- two R1 groups in T together or one or more R1 groups in T together with R5 may optionally be joined to form a ring structure.
9 more elements
A Group 4 transition metal complex corresponding to the following formula:
- wherein:
- M is titanium, zirconium, or hafnium in the +4, +3, or +2 oxidation state;
- Y1 and Y2 are independently an anionic, cyclic or non-cyclic, π-bonded group, NR1, PR1;
- NR12 or PR12;
- Z is boron or aluminum;
- Q is a neutral, anionic or dianionic ligand group depending on the oxidation state of M;
- j is 1, 2 or 3 depending on the oxidation state of M and the electronic nature of Q;
- T independently each occurrence is:
- wherein R1 is independently each occurrence hydrogen, a hydrocarbyl group, a tri(hydrocarbyl)silyl group, or a tri(hydrocarbyl)silylhydrocarbyl group, said R1 groups containing up to 20 atoms not counting hydrogen;
- R5 is R1 or N(R1)2;
- and
- two R1 groups in T together or one or more R1 groups in T together with R5 may optionally be joined to form a ring structure.
9 more elements
A Group 4 transition metal complex corresponding to the following formula:
- wherein:
- M is titanium, zirconium, or hafnium in the +4, +3, or +2 oxidation state;
- Y1 and Y2 are independently an anionic, cyclic or non-cyclic, π-bonded group, NR1, PR1;
- NR12 or PR12;
- Z is boron or aluminum;
- Q is a neutral, anionic or dianionic ligand group depending on the oxidation state of M;
- j is 1, 2 or 3 depending on the oxidation state of M and the electronic nature of Q;
- T independently each occurrence is:
- R1 is independently each occurrence hydrogen, a hydrocarbyl group, a tri(hydrocarbyl)silyl group, or a tri(hydrocarbyl)silylhydrocarbyl group, said R1 groups containing up to 20 atoms not counting hydrogen;
- R5 is R1 or N(R1)2;
- and
- two R1 groups in T together or one or more R1 groups in T together with R5 may optionally be joined to form a ring structure.
9 more elements
A Group 4 transition metal complex corresponding to the following formula:
- wherein:
- M is titanium, zirconium, or hafnium in the +4, +3, or +2 oxidation state;
- Y1 and Y2 are independently an anionic, cyclic or non-cyclic, π-bonded group, NR1, PR1;
- NR12 or PR12;
- Z is boron or aluminum;
- Q is a neutral, anionic or dianionic ligand group depending on the oxidation state of M;
- j is 1, 2 or 3 depending on the oxidation state of M and the electronic nature of Q;
- and
- T each occurrence is (CH3)2N—.
6 more elements
A Group 4 transition metal complex corresponding to the following formula:
- wherein:
- M is titanium, zirconium, or hafnium in the +4, +3, or +2 oxidation state;
- Y1 and Y2 are independently an anionic, cyclic or non-cyclic, π-bonded group, NR1, PR1;
- NR12 or PR12;
- Z is boron or aluminum;
- Q is a neutral, anionic or dianionic ligand group depending on the oxidation state of M;
- j is 1, 2 or 3 depending on the oxidation state of M and the electronic nature of Q;
- T independently each occurrence is:
- and two R1 groups in T together or one or more R1 groups in T together with R5 are joined to form a ring structure.
6 more elements
A process for preparing a metal complex corresponding to the formula:
- wherein:
- M is titanium, zirconium, or hafnium in the +2 oxidation state;
- Y1 and Y2 are independently an anionic, cyclic or non-cyclic, π-bonded group, NR1 or PR1;
- Z is boron or aluminum;
- Q is a neutral ligand group;
- j is 1;
- T independently each occurrence is:
- R1 is independently each occurrence hydrogen, a hydrocarbyl group, a tri(hydrocarbyl)silyl group, or a tri(hydrocarbyl)silylhydrocarbyl group, said R1 groups containing up to 20 atoms not counting hydrogen;
- R5 is R1 or N(R1)2;
- and
- two R1 groups in T together or one or more R1 groups in T together with R5 may optionally be joined to form a ring structure,
- said process comprising contacting a compound having a ligand structure of formula 1A or 2A
- Y1′ and Y2′ are independently an anionic, cyclic or non-cyclic, π-bonded group, NR1 or PR1;
- and T and Z, are as previously defined,
- or a deprotonated dianionic derivative thereof,
- with a Group 4 precursor of the formula 3:
- wherein M is defined as above;
- Y3 is a leaving group;
- R6 independently each occurrence is hydrogen, a hydrocarbyl group, a tri(hydrocarbyl)silyl group, or a tri(hydrocarbyl)silylhydrocarbyl group, said R6 groups containing up to 20 atoms not counting hydrogen;
- and
- LB is a Lewis base of up to 20 carbons.
18 more elements
A compound of formula 1A or 2A
- wherein R4 is trimethylsilyl;
- Y1′ and Y2′ are independently an anionic, cyclic or non-cyclic, π-bonded group, NR1, PR1;
- NR12 or PR12;
- Z is boron or aluminum;
- T independently each occurrence is:
- R1 is independently each occurrence hydrogen, a hydrocarbyl group, a tri(hydrocarbyl)silyl group, or a tri(hydrocarbyl)silylhydrocarbyl group, said R1 groups containing up to 20 atoms not counting hydrogen;
- R5 is R1 or N(R1)2;
- and
- two R1 groups in T together or one or more R1 groups in T together with R5 may optionally be joined to form a ring structure.
6 more elements
Dependencies are inferred from the claim text.