N.m.r. study of the self-association of ethyl and t-butyl alcohols in nonpolar solvents

Abstract

N.m.r. dilution shifts of OH protons in ethyl and t-butyl alcohols have been measured in benzene, carbon tetrachloride and cyclohexane. The results were analysed on the basis of a linear association model and the association constants were estimated. The constants for ethyl alcohol were about twice as large as those for t-butyl alcohol in the same solvent. Excess Gibbs free energy and activity coefficients for the ethyl alcohol + cyclohexane mixture were calculated by employing equations derived from Flory's theory of high polymer solutions.