TRANSITION METAL COMPLEXES COMPRISING .BETA.-DIIMINATE LIGANDS AND PROCESSES FOR POLYMERIZING OLEFINS

摘要

The present invention relates to catalyst systems, processes for making such catalysts, intermediates for such catalysts, and olefin polymerization processes using such catalysts wherein such catalyst includes a component represented by formula (IA) wherein R and R' independently represent a hydrogen atom, or a substituted or unsubstituted, branched or unbranched hydrocarbyl or organosilyl radical; R<1>, R<2>, and R<3> independently represent a hydrogen atom, or a substituted or unsubstituted, branched or unbranched hydrocarbyl radical; M is a group IIIB, IVB, VB, VIB, VIIB or VIII transition metal; T independently represents a univalent anionic ligand such as a hydrogen atom, or a substituted or unsubstituded hydrocarbyl, halogeno, aryloxido, arylorganosilyl, alkylorganosilyl, amido, arylamido, phosphido, or arylphosphido group, or two T groups taken together represent an alkylidene or a cyclometallated hydrocarbyl bidendate ligand; L independently represents a sigma donor stabilizing ligand; X, which is optional, represents a relatively weakly coordinated anion; and a = 0 to 4 inclusive, b = 0 to 4 inclusive, provided a+b