Activity Coefficients at Infinite Dilution of Alkanes, Alkenes, and Alkyl Benzenes in 1-Ethyl-3-methylimidazolium Diethylphosphate Using Gas–Liquid Chromatography

Abstract

The activity coefficients at infinite dilution, γi∞, for 16 organic solutes: alkanes, alkenes, and alkyl benzenes in the ionic liquid 1-ethyl-3-methylimidazolium diethylphosphate ([EMIM][DEP]) have been measured by the gas–liquid chromatographic method. The measurements were carried out in the temperature range of (303.15 to 343.15) K. The partial molar excess enthalpies at infinite dilution, HiE,∞, of the solutes in [EMIM][DEP] were also derived from the temperature dependence of the γi∞ values.