Patent ID: 6140521
Filing Date: 2000-10-31
Classification: C07F,C08F,Y10S

Abstract:
An ansa bis(.mu.-substituted) Group 4 metal and aluminum compound corresponding to the formula: ##STR14## wherein: L' is a .pi.-bonded group,M is a Group 4 metal,J is nitrogen or phosphorus;Z is a divalent bridging group,R' is an inert monovalent ligand;r is one or two;X independently each occurrence is a Lewis basic ligand group able to form a .mu.-bridging ligand group, and optionally the two X groups may be joined together, andA' independently each occurrence is an aluminum-containing Lewis acid compound of up to 50 atoms other than hydrogen, that forms an adduct with the metal complex by means of the .mu.-bridging groups, and optionally two A' groups may be joined together thereby forming a single difunctional Lewis acid containing compound.