METHOD OF POLYMERIZATION

摘要

This invention relates to a composition of mat-iter represented by formula (I), 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 formula (I): 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 C1 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 inde-pendently an aryl group, a substituted aryl group, a cyclic alkyl group, a substitutedcyclic alkyl group, or multiple ring system, R6 and R7 a re independently absent or hydrogen, halogen, a het-eroatom or a hydrocarbyl group, or heteroatom containing group.