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Effective catalytic system of zinc-substituted polyoxometalate for cycloaddition of CO2 to epoxides

Meenakshisundaram, Sankar, Tarte, N.H. and Manikandan, P. 2004. Effective catalytic system of zinc-substituted polyoxometalate for cycloaddition of CO2 to epoxides. Applied Catalysis A: General 276 (1-2) , pp. 217-222. 10.1016/j.apcata.2004.08.008

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Abstract

A zinc-substituted sandwich-type polyoxometalate, Na12[WZn3(H2O)2(ZnW9O34)2]·46H2O, in conjunction with a Lewis base was found to be efficient for the cycloaddition of CO2 with epoxides to form cyclic carbonates. The catalyst system was tested for a few representative epoxides, including epichlorohydrin, propylene oxide and butylene oxide; the reactions were carried out at moderate CO2 pressure (0.4–1.0 MPa) in the temperature range 100–160 °C. Using the present catalyst system, one could obtain near-quantitative conversion and high selectivity with or without organic solvents. The zinc-substituted polyoxometalate part of the catalyst system is heterogeneous, easy to separate after completion of reactions and reusable for many runs.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Cardiff Catalysis Institute (CCI)
Chemistry
Publisher: Elsevier
ISSN: 0926-860X
Last Modified: 04 Jun 2017 06:33
URI: http://orca.cf.ac.uk/id/eprint/61948

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