TRANSITION METAL-COMPLEX CATALYSTS HAVING APPENDED GROUP 13 LEWIS ACIDS AND RELATED POLYMERIZATION METHODS

摘要

Compositions may comprise symmetrical and asymmetrical pyridine-containing transition metal-complexes having appended group (13) Lewis acids positioned on the pyridine-containing ligands of the transition metal-complex such that the group (13) Lewis acid may be near the catalytic site, thereby allowing the appended group (13) Lewis acid to function more efficiently in promoting formation of a catalyticaiiy active species. Catalysts systems may comprise these symmetrical and asymmetrical pyridine-containing transition metal-complexes and methods of preparing polyolefins may use these catalyst systems.