Abstract
Through an empirical analysis of transfer enthalpies in acetonitrile–methanol mixtures using ten quaternary ammonium ions, an equation which expresses the behaviour of the transfer enthalpy as a function of solvent composition has been derived: ΔHAN→mixt(RR′3N+)=ΔHAN→mixt[(Bun)4N+]+δRΔHAN→MeOHt(RR′3N+)xMeOH+A(RR′3N+)xMeOHxAN. On the basis of this equation it is suggested that the transfer enthalpy includes at least three types of interaction, a protophobic interaction, an electrostatic interaction and another interaction, presumably a specific interaction such as dipole–dipole or acid–base association.
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More From: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
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