Well-controlled block polymerization/copolymerization of alkenes and/or carbon monoxide by cationic palladium methyl complexes

Cationic palladium imine-phosphine complexes [Pd(P-N)(CH3)(CH3CN)](+) catalyze the living block polymerization and copolymerization of olefins and/or carbon monoxide. The palladium-capped polymers, intermediates of the polymerization, were isolated.