Abstract
Gas-to-ionic liquid (IL) partition coefficients have been compiled from the published literature for solutes dissolved in anhydrous 1-butyl-3-methylimidazolium 4,5-dicyano-2-(trifluoromethyl)imidazolide, ([BMIm]+[TDI]–), and 3-methyl-N-butylpyridinium 4,5-dicyano-2-(trifluoromethyl)imidazolide, ([3-MBPy]+[TDI]–). The compiled partition coefficients were converted to water-to-IL partition coefficients using the corresponding gas-to-water partition coefficients. Both sets of partition coefficients were analysed using the ion-specific equation coefficient version of the Abraham solvation parameter model. Equation coefficients are determined for the first time for 4,5-dicyano-2-(trifluoromethyl)imidazolide. Mathematical correlations derived from the Abraham model describe the observed gas-to-IL and water-to-IL partition coefficient data to within a standard deviation of 0.07 and 0.11 log units, respectively.
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