Tetrahaloindate(III)-Based Ionic Liquids in the Coupling Reaction of Carbon Dioxide and Epoxides To Generate Cyclic Carbonates: H-Bonding and Mechanistic Studies
Yong Jin Kim and Rajender S. Varma*
*Sustainable Technology Division, National Risk Management Research
Laboratory, U.S. Environmental Protection Agency, 26 West Martin Luther King
Drive, MS 443, Cincinnati, Ohio 45268, Email: varma.rajender
epa.gov
Y. J. Kim, R. S. Varma, J. Org. Chem., 2005, 70, 7882-7891.
DOI: 10.1021/jo050699x
Abstract
A series of tetrahaloindate(III)-based ionic liquids (ILs) have been produced by microwave-assisted synthesis. These ionic liquids have been examined as catalyst in the reaction of CO2 with a various epoxides to give cyclic carbonates. Tetrahaloindate(III)-based ILs are found to exhibit high catalytic activities. The effects of a variety of parameters (temperature, pressure, molar ratio of propylene oxide to catalyst), the mechanism, and the significant role of H-bonding interactions in the coupling reactions are discussed.
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Key Words
Ionic liquids, cyclic carbonates, green chemistry
ID: J42-Y2005-1330
