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Issue 4, 2010
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Reversible zwitterionic liquids, the reaction of alkanol guanidines, alkanol amidines, and diamines with CO2

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Abstract

Alkanolamidines, alkanolguanidines and diamines each react with CO2 to form reversible zwitterionic liquids. CO2 is chemically bound to the alcohol on alkanolamidines and alkanolguanidines as zwitterionic alkylcarbonates, while CO2 is chemically bound on diamines as zwitterionic carbamates. All three classes of zwitterionic liquids could be reverted to their non-ionic forms by thermally stripping the CO2 at temperatures near 50 °C, while one derivative was found to irreversibly form a cyclic carbonate.

Graphical abstract: Reversible zwitterionic liquids, the reaction of alkanol guanidines, alkanol amidines, and diamines with CO2

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Publication details

The article was received on 25 Nov 2009, accepted on 22 Jan 2010 and first published on 03 Mar 2010


Article type: Paper
DOI: 10.1039/B924790D
Citation: Green Chem., 2010,12, 713-721
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    Reversible zwitterionic liquids, the reaction of alkanol guanidines, alkanol amidines, and diamines with CO2

    D. J. Heldebrant, P. K. Koech, M. T. C. Ang, C. Liang, J. E. Rainbolt, C. R. Yonker and P. G. Jessop, Green Chem., 2010, 12, 713
    DOI: 10.1039/B924790D

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