Journal of the American Chemical Society 2004-10-06

Palladium-catalyzed copolymerization of ethene with acrolein dimethyl acetal: catalyst action and deactivation.

Weidong Li, Xiaochun Zhang, Auke Meetsma, Bart Hessen

Index: J. Am. Chem. Soc. 126(39) , 12246-7, (2004)

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Abstract

Acrolein dimethyl acetal (ADMA) can be copolymerized with ethene using a cationic alpha-diimine palladium chelate catalyst to yield branched copolymers. Catalyst deactivation occurs via methanol elimination to give an inert eta3-1-methoxyallyl palladium species. This process can be retarded by the addition of an aliquot of methanol to the reaction mixture, increasing overall catalyst productivity.