Solvation model for acetic acid in binary mixtures of cyclohexane-1,2-dichloroethane

摘要

The partition of acetic acid between aqueous solutions and various binary mixtures of 1,2-dichloroethane and cyclohexane were studied at 30.0degreesC. The observed nonlinearities of both monomer partition coefficient and dimerization constant in the organic phase with the mole fraction of 1,2-dichloroethane are interpreted in terms of the preferential solvation of various solvation sites of the involved species. Two polar sites were identified for the monomer each with a solvation preference by 1,2-dichloroethane seven times that by cyclohexane. This preference decreases to about two upon dimerization. (C) 2004 Elsevier B.V. All rights reserved.