Ultra-high activity non-metallocene pre-catalyst and method for catalytic polymerization of alpha-olefin monomers

摘要

Disclosed are compounds of the following formulae, and their use in the polymerization of olefins:wherein M is preferably titanium, zirconium or hafnium, R1-R8 are univalent radicals, X1 and X2 are univalent ligands, X3 is a divalent ligand, and (RnY-T) is an optional donor or non-donor group.