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AssigneesUnivation Technologies, LLC, (US), Massachusetts Institute of Technology, (US)
InventorsDavid H. McConville, Richard R. Schrock
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This invention relates to a composition of matter represented by the formula below, and to a polymerization process comprising combining an olefin in the gas or slurry phase with an activator, a support and a compound represented by the following formula: wherein M is a group 3 to 14 metal, each X is independently an anionic leaving group, n is the oxidation state of M, m is the formal charge of the YZL ligand, Y is a group 15 element, Z is a group 15 element, L is a group 15 or 16 element, R1 and R2 are independently a C, to C20 hydrocarbon group, a heteroatom containing group, silicon, germanium, tin, lead, phosphorus, a halogen, R1 and R2 may also be interconnected to each other, R3 is absent, or is hydrogen, a group 14 atom containing group, a halogen, a heteroatom containing group, R4 and R5 are independently an aryl group, a substituted aryl group, a cyclic alkyl group, a substituted cyclic alkyl group, or multiple ring system, R6 and R7 are independently absent or hydrogen, halogen, a heteroatom or a hydrocarbyl group, or a heteroatom containing group.
A method to prepare a metal compound comprising reacting a neutral ligand with a compound represented by the formula MnXn where M is a group 3-14 metal, n is the oxidation state of M, and X is an anionic group in a non-coordinating or weakly coordinating solvent, at about 20 to about 100° C., then treating the mixture with an excess of an alkylating agent, then recovering the metal complex and wherein the neutral ligand is represented by the formula:
A method to prepare a metal adduct comprising reacting a neutral ligand with a compound represented by the formula MnXn where M is Zr or Hf, n is the oxidation state of M, X is a halogen in a non-coordinating or weakly coordinating solvent, at 20° C. or more, then recovering the metal adduct;
Dependencies are inferred from the claim text.