Activity coefficients at infinite dilution measurements for organic solutes and water in the ionic liquid 1-butyl-1-methylpyrrolidinium trifluoromethanesulfonate using GLC

Activity coefficients at infinite dilution, γ 13 ∞ , for 32 organic compounds: alkanes, alk-1-enes, alk-1-ynes, cycloalkanes, aromatic hydrocarbons, alcohols, thiophene, tetrahydrofuran, tert-butyl methyl ether and water in the ionic liquid 1-butyl-1-methylpyrrolidinium trifluoromethanesulfonate [BMPYR][CF3SO3] were determined by gas–liquid chromatography at the temperatures ranging from 298.15 to 368.15 K. The partial molar excess enthalpies at infinite dilution Δ H 1 E , ∞ were calculated from the experimental γ 13 ∞ values obtained over the temperature range. The selectivities for the n-hexane/benzene, cyclohexane/benzene, n-hexane/thiophene, cyclohexane/thiophene, benzene/thiophene and hexen-1-ene/n-hexane separation problems were calculated from the γ 13 ∞ and compared to the literature values for other ionic liquids, NMP and sulfolane.