Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Densities of butyltriethylammonium iodide solutions in methanol, 2-propanone, acetonitrile, and nitrobenzene were measured at 298.15 K. Using published values for the Debye-Hckel limiting slopes AV, apparent molar volume data were fitted to the Redlich-Rosenfeld-Meyer and the Pitzer equations, allowing the evaluation of partial molar volumes at infinite dilution 0 and deviation parameters BV. The results show a similarity between the 0 values for the asymmetrical quaternary ammonium salt (where the cation has a slightly extended alkyl group) and those for the corresponding symmetrical salt (presenting the four alkyl groups identical to the longest of them). Parameter BV is shown to be solvent dependent.