Spectroscopic study demonstrates spontaneous carboxylation in liquid 1-butyl-3-methylimidazolium acetate exposed to carbon dioxide, indicating rapid chemical capture under ambient conditions.
The formation of 1-butyl-3-methylimidazolium-2-carboxylate in the mixture of CO(2) with 1-butyl-3-methylimidazolium acetate under mild conditions (298 K, 0.1 MPa) has been put in evidence in the liquid phase using Raman and infrared spectroscopy complemented by DFT calculations and NMR ((1)H, (13)C, (15)N) spectroscopy.
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Besnard et al. (2011) studied this question.
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