Metallocene catalysts for producing vinyl-terminated polyalphaolefins and methods associated therewith

A method comprising:

• contacting a catalyst system with an olefinic feed comprising a C3-C32 alpha olefin under polymerization reaction conditions, wherein the catalyst system comprises at least one activator and a metallocene compound represented by the formula:
• wherein:
• M is a group 4 transition metal;
• T is a bridging group;
• each X is independently a leaving group, or two Xs are joined and bound to the metal atom to form a metallocycle ring, or two Xs are joined to form a chelating ligand, a diene ligand, or an alkylidene;
• R1 and R2 are independently hydrogen, or a C1-C40 optionally substituted hydrocarbyl group, halide, or siloxyl group;
• R3, R4, R5 and R6 are independently a C1-C40 optionally substituted hydrocarbyl, halocarbyl, silylcarbyl, aminocarbyl, or siloxyl group;
• and
• R7, R8, R9, R10, R11, and R12 are independently hydrogen or a C1-C40 optionally substituted hydrocarbyl, halocarbyl, silylcarbyl, aminocarbyl, germylcarbyl, oxyhydrocarbyl, halide, or siloxyl group, where at least one of R1, R2, R7, R8, R9, R10, R11, and R12 is not H;
• and
• obtaining a plurality of polyalphaolefins (PAOs) having at least 30 mol % vinyl-terminated PAOs, the vinyl-terminated PAOs having a terminal —CH═CH2 group.

A method comprising:

• contacting a catalyst system with an olefinic feed comprising a C3-C32 alpha olefin under polymerization reaction conditions, wherein the catalyst system comprises at least one activator and a metallocene compound represented by the formula:
• wherein:
• M is a group 4 transition metal;
• T is a bridging group;
• each X is independently a leaving group, or two Xs are joined and bound to the metal atom to form a metallocycle ring, or two Xs are joined to form a chelating ligand, a diene ligand, or an alkylidene;
• R1 and R2 are independently hydrogen, or a C1-C40 optionally substituted hydrocarbyl group, halide, or siloxyl group;
• R3, R4, R5 and R6 are independently a C1-C40 optionally substituted hydrocarbyl, halocarbyl, silylcarbyl, aminocarbyl, or siloxyl group;
• and
• R7, R8, R9, R10, R11, R12, R13, and R14 are independently hydrogen or a C1-C40 optionally substituted hydrocarbyl, halide, or siloxyl group;
• and
• obtaining a plurality of vinyl terminated polyalphaolefins (PAOs) having at least 30 mol % vinyl-terminated PAOs, the vinyl-terminated PAOs having a terminal —CH═CH2 group.