| CPC C08F 4/65908 (2013.01) [C08F 2/04 (2013.01); C08F 210/16 (2013.01)] | 14 Claims |
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1. A process for polymerizing olefins, the process comprising contacting ethylene and optionally one or more (C3-C12)α-olefin in the presence of a catalyst system, wherein the catalyst system comprises a metal-ligand complex having a structure according to formula (I):
 where:
M is titanium, zirconium, or hafnium;
each X is benzyl, (C1-C12)alkyl, halogen atom, —CH2SiRR3, or —(CH2)n(SiRC)3, wherein n is an integer from 1 to 10, wherein each RR is (C1-C12)alkyl, and wherein each RC is independently (C1-C30)hydrocarbyl, (C1-C30)heterohydrocarbyl, or —H;
R1 is independently chosen from (C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl, —Si(RC)3, —Ge(RC)3, —P(RP)2, —N(RN)2, —ORC, —SRC, —NO2, —CN, —CF3, RCS(O)—, RCS(O)2—, (RC)2C═N—, RCC(O)O—, RCOC(O)—, RCC(O)N(R)—, (RC)2NC(O)—, or halogen, wherein each RC, each RN, and each RP are independently (C1-C30)hydrocarbyl, (C1-C30)heterohydrocarbyl, or —H;
R2, R3, and R4 are independently chosen from —H, (C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl, —Si(RC)3, —Ge(RC)3, —P(RP)2, —N(RN)2, —ORC, —SRC, —NO2, —CN, —CF3, RCS(O)—, RCS(O)2—, (RC)2C═N—, RCC(O)O—, RCOC(O)—, RCC(O)N(R)—, (RC)2NC(O)—, or halogen, wherein each RC and each RN is (C1-C30)hydrocarbyl, (C1-C30)heterohydrocarbyl, or —H; and
R5 is —H, (C1-C40)hydrocarbyl or (C1-C40)heterohydrocarbyl, provided R5 is not phenyl or a substituted phenyl.
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