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Activity coefficients at infinite dilution γ i ∞ of 19 alkanes, alkenes, and alkylbenzenes in the ionic liquid 4-methyl- n -butylpyridinium tetrafluoroborate (C 10 H 16 BF 4 N) were determined by gas chromatography using the ionic liquid as stationary phase. The measurements were carried out at different temperatures between 313.1 K and 363.1 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.
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Heintz et al. (2001) studied this question.
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