Patent ID: 6953764
Filing Date: 2005-10-11
Classification: C07F,C08F

Abstract:
1. A metal complex corresponding to the formula: wherein G 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 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.