Enthalpy of solvation correlations for organic solutes and gases dissolved in acetonitrile and acetone

Data have been assembled from the published literature on the enthalpies of solvation for 74 compounds dissolved in acetonitrile and for 81 compounds dissolved in acetone. It is shown that an Abraham solvation equation can be used to correlate the experimental enthalpies of solvation in acetonitrile and acetone to within standard deviations of 2.17 and 2.72 kJ/mole, respectively. The derived correlations provide very accurate mathematical descriptions of the measured enthalpy of solvation data at 298 K, which in the case of acetonitrile span a range of about 90 kJ/mole. Mathematical correlations have also been derived for predicting the enthalpies of solvation in both solvents based on the Goss modified version of the Abraham model. Expressions based on this latter model were found to correlate the experimental enthalpies of solvation to within an overall average standard deviation of 2.52 kJ/mole for the two solvents studied.