ИСТИНА

Catalyst systems comprising the complexes, and polymerization methods for olefinic monomers using the catalyst systems. In said formula, M is a transition metal; E is NR2, CR3R4, O, S, or SiR5R6; Q is optional substitution; p is an integer ranging from 0 to 3; L is an optional neutral ligand; m is an integer ranging from 0 to 3; X is an anionic leaving group; n is 1 or 2, with m+n being 4 or less; J is a linker group contributing two or three atoms that are located within a first chelate ring; R1 and R1′ are independently a hydrocarbyl group or a trihydrocarbylsilyl group; R2 is a hydrocarbyl group; R3 and R4 are independently H, a hydrocarbyl group, or a trihydrocarbylsilyl group; and R5 and R5 are independently a hydrocarbyl group.