Publication
Journal of Physical Chemistry
Paper

Heats of solution of some tetraalkylammonium salts in water and in propylene carbonate and ionic enthalpies of transfer from water to propylene carbonate

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Abstract

In an extension of earlier work1 the enthalpies of transfer of several additional ions from water to propylene carbonate at 25° were determined calorimetrically. The results for ΔH° relative to that for Na+ are: Me4N+, -1.45; Et4N+, 2.65; Cl-, 3.83; Br-, 0.85; I-, -3.22 (all in kcal/mole). Apparently these conventional single-ion values and those reported earlier1 are quite close to the real, or absolute, single-ion enthalpies of transfer. Most of the results can be understood in terms of well-known structural effects in the water solutions, but this does not seem to be true of the enthalpy of transfer of B(C6H5)4-.

Date

01 May 2002

Publication

Journal of Physical Chemistry

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