Activity Coefficients at Infinite Dilution of Alkanes, Alkenes, and Alkyl Benzenes in 1-Butyl-3-methylimidazolium Tetrafluoroborate Using Gas−Liquid Chromatography

Activity coefficients at infinite dilution of 17 alkanes, alkenes, and alkyl benzenes in the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate were determined by gas chromatography using the ionic liquid as the stationary phase. The measurements were carried out at different temperatures between 303.15 K and 343.15 K. From the temperature dependence of the limiting activity coefficients, partial molar excess enthalpies at infinite dilution of the organic solutes in the ionic liquids have been derived.