Excess Properties of Binary Mixtures of Esters of Carbonic Acid + Three Aryl Alcohols at 308.15 K

Abstract

Excess molar enthalpies, , and excess molar volumes, , of binary mixtures containing dimethyl carbonate, or diethyl carbonate, or propylene carbonate + benzyl alcohol, + 2-phenylethyl alcohol, and + 3-phenyl-1-propyl alcohol have been studied over the entire range of composition at 308.15 K and at atmospheric pressure using a flow microcalorimeter and a digital density meter. The values are positive, increasing as the chain length of aryl alcohol increases and showing a maximum varying from 1040 J·mol-1 (diethyl carbonate + benzyl alcohol) up to 1730 J·mol-1 (dimethyl carbonate + 3-phenyl-1-propyl alcohol). values are negative or positive with no definite trend. The mixture containing propylene carbonate + 2-phenylethyl alcohol shows an inversion of sign. All curves for mixtures containing dimethyl carbonate and diethyl carbonate are quasi-symmetrical, whereas those containing propylene carbonate are asymmetrical. Results were fitted to the Redlich−Kister polynomial. The results are qualitatively discusse...