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Chlorometallate(III) ionic liquids as Lewis acidic catalysts--a quantitative study of acceptor properties
Julien Estager1, Alexander A Oliferenko, Kenneth R Seddon
1QUILL, The Queen's University of Belfast, Belfast, UK BT9 5AG.
Abstract:
The Gutmann Acceptor Number (AN), which is a quantitative measure of Lewis acidity, has been estimated using the (31)P NMR chemical shift of a probe molecule, triethylphosphine oxide, for a range of chlorometallate(III) ionic liquids, based on Group 13 metals (aluminium(III), gallium(III) and indium(III)) and the 1-octyl-3-methylimidazolium cation, at different compositions. The results were interpreted in terms of extant speciation studies of chlorometallate(III) ionic liquids, and compared with a range of standard molecular solvents and acids. The value of these data were illustrated in terms of the selection of appropriate ionic liquids for specific applications.
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