Collect. Czech. Chem. Commun. 1999, 64, 1748-1760

The Solvation Properties of the Aliphatic Alcohols

Michael H. Abrahama,*, Joelle lea and William E. Acree, Jr.b

a Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
b Department of Chemistry, University of North Texas, Denton, TX 76203-0068, U.S.A.


Solubilities of solute gases and vapours, as log L, where L is the Ostwald solubility coefficient, in the alkan-1-ols from methanol to decan-1-ol have been correlated through the solvation equation of Abraham. It is shown that there is a regular progression of solvent properties from methanol to decan-1-ol, except for the solvent hydrogen-bond basicity that remains the same along the series, and, indeed, is the same as that of water. A slightly different solvation equation is used to correlate the partition of solutes from water to the dry alkanols. For the longer chain alkanols, the coefficients in the solvation equations approach those in equations for partition from water to the wet (water-saturated) alkanols, showing that the solvation properties of the wet and dry alkanols are quite close for the higher alkanol homologues.

Keywords: Hydrogen bonding; Solvation equations; Gas-water partition; Water-alkanol partition.