Patent ID: 6953764

Claim:
A metal complex corresponding to the formula: wherein G 1 is selected from alkyl, cycloalkyl, aryl, aralkyl, alkaryl, heteroalkyl, heterocycloalkyl, heteroaryl, heteroaralkyl, heteroalkaryl, silyl, and inertly substituted derivatives thereof containing from 1 to 40 atoms not counting hydrogen; T is a divalent bridging group of from 10 to 30 atoms not counting hydrogen, selected from mono- or di- aryl-substituted methylene or silylene groups or mono- or di-heteroaryl-substituted methylene or silylene groups, wherein at least one such aryl- or heteroaryl-substituent is substituted in one or both ortho-positions with a secondary or tertiary alkyl-group, a secondary or tertiary heteroalkyl group, a cycloalkyl group, or a heterocycloalkyl group, G 2 is a C 6-20 heteroaryl group containing Lewis base functionality; M is the Group 4 metal; X ″″ is an anionic, neutral or dianionic ligand group; x″″ is a number from 0 to 5 indicating the number of X″″ groups, and bonds, optional bonds and electron donative interactions are represented by lines, dotted lines and arrows respectively.