Volume 85, 1988

Solvation of gaseous non-electrolytes

Abstract

Linear free energy equations, log L=c+*2+H2+H2+l log L16 log L=c+22+H2+H2+l log L16 have been used to analyse the solvation of a series of gaseous non-electrolytes in a given bulk solvent as log L values where L is the Ostwald solubility coefficient. The parameters π*2, αH2, βH2, log L16 and µ2 characterise the solutes and the constants c, s, a, b and l are obtained by multiple linear-regression analysis. It is shown that for solvation in the bulk solvents ethyl acetate, acetonitrile, ethanol and methanol, the contribution of hydrogen-bonding terms to solvation is quite small, the main contributing terms being an endoergic cavity term and an exoergic solute–solvent dispersion interaction term. Even with bulk water as the solvent, hydrogen-bonding interactions of the type solute (base)–water (acid) and solute (acid)–water (base) are not more than ca. -15 or -11 kJ mol–1, respectively, for DMSO (base) and ethanol (acid). It is shown also that linear free energy equations can be used for the correlation and prediction of the solubility of gaseous solutes in a given liquid phase, even when the latter is polymeric in nature.

Article information

Article type
Paper

Faraday Discuss. Chem. Soc., 1988,85, 107-115

Solvation of gaseous non-electrolytes

M. H. Abraham, P. L. Grellier, I. Hamerton, R. A. McGill, D. V. Prior and G. S. Whiting, Faraday Discuss. Chem. Soc., 1988, 85, 107 DOI: 10.1039/DC9888500107

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements