Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Activity coefficients of 42 to 54 organic compounds in the four ionic liquids (ILs) 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate, 1-butyl-3-methylimidazolium bis(pentafluoroethylsulfonyl)imide, 1,3-didecyl-2-methylimidazolium bis(trifluoromethylsulfonyl)imide, and 1-ethyl-3-methylimidazolium methanesulfonate were measured using inverse gas chromatography from (312 to 353) K. The retention data were also converted to gas-to-IL and water-to-IL partition coefficients using the corresponding gas-to-water partition coefficients. Both sets of partition coefficients were analyzed using the modified Abraham solvation parameter model. The derived equations correlated the experimental gas-to-IL and water-to-IL partition coefficient data to within average standard deviations of 0.113 and 0.143 log units, respectively.