Exploration of Cocatalyst Effects on a Bimetallic Cobalt Catalyst System: Enhanced Activity and Enantioselectivity in Epoxide Polymerization

Peter C. B. Widger, Syud M. Ahmed, Geoffrey W. Coates

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Organic ionic compounds were synthesized and investigated as cocatalysts with a bimetallic cobalt complex for enantioselective epoxide polymerization. The identities of both the cation and the anion were systematically varied, and the subsequent reactivity was studied. The nature of the ionic cocatalyst dramatically impacted the rate and enantioselectivity of the catalyst system. The ionic cocatalyst [P(N=P(N(CH2)4)3) 4 +][tBuCO2 -] in combination with a bimetallic cobalt complex produced a catalyst system that exhibited the greatest activity and selectivity for a variety of monosubstituted epoxides. © 2011 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)5666-5670
Number of pages5
JournalMacromolecules
Volume44
Issue number14
DOIs
StatePublished - Jul 26 2011
Externally publishedYes

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