Exploration of Cocatalyst Effects on a Bimetallic Cobalt Catalyst System: Enhanced Activity and Enantioselectivity in Epoxide Polymerization
KAUST Grant NumberKUSC1-018-02
Permanent link to this recordhttp://hdl.handle.net/10754/598292
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AbstractOrganic 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.
CitationWidger PCB, Ahmed SM, Coates GW (2011) Exploration of Cocatalyst Effects on a Bimetallic Cobalt Catalyst System: Enhanced Activity and Enantioselectivity in Epoxide Polymerization. Macromolecules 44: 5666–5670. Available: http://dx.doi.org/10.1021/ma201078m.
SponsorsWe thank the NSF (CHE-0809778) and the King Abdullah University of Science and Technology (KAUST; Award KUSC1-018-02) for support of this research. The authors are grateful to Dr. Kevin J. T. Noonan for helpful suggestions and Dr. Heloise Therien-Aubin for GPC analysis of isotactic poly(1,1,1-trifluoro-2,3-epoxypropane).
PublisherAmerican Chemical Society (ACS)