Cationic zinc complexes: a new class of catalyst for living lactide polymerization at ambient temperature

Craig A. Wheaton; Paul G. Hayes

doi:10.1039/C0CC03463K

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Chemical Communications

Issue 44, 2010

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Cationic zinc complexes: a new class of catalyst for living lactide polymerization at ambient temperature

Craig A. Wheaton and Paul G. Hayes

Chem. Commun., 2010,46, 8404-8406

DOI: 10.1039/C0CC03463K
Received 25 Aug 2010, Accepted 17 Sep 2010
First published on the web 07 Oct 2010

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Cationic zinc complexes of a bis(phosphinimine) pincer ligand have been prepared. Methylzinc and zinc–lactate complexes have been structurally characterized, and the latter is the first cationic metal complex to promote coordination–insertion polymerization of lactide at ambient temperature. This novel catalyst system is remarkably active and also exhibits living character. A detailed investigation of the kinetics and mechanism of the polymerization process has been undertaken.