Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 70, Issue 20, Pages 7882-7891Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo050699x
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The microwave reactions of InX3 with [Q]Y produce a series of tetrahaloindate(III)-based ionic liquids (ILs) with a general formula of [Q] [InX3Y] (Q = imidazolium, phosphonium, ammonium, and pyridinium; X = Cl, Br, I; Y = Cl, Br). The reaction Of CO2 with a variety of epoxides has been examined in the presence of these ILs wherein tetrahaloindate(III)-based ILs are found to exhibit high catalytic activities and evidence is presented that supports the significant role of H-bonding interactions in the [Q] [InX3Y] -catalyzed coupling reactions. The effects of various parameters such as temperature, pressure, and molar ratio of propylene oxide to catalyst have been investigated, and the plausible reaction mechanism based on the H-1 and C-13 NMR studies is presented for the formation of propylene carbonate.
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