Molecular Interactions in Binary Mixtures of 2-Cholroaniline and Monosubstituted Benzene Derivatives at Various Temperatures

Abstract

The densities (ρ), speed of sound (u) values, and viscosities (η) were reported for binary mixtures of 2-chloroaniline with benzene derivatives (chlorobenzene, bromobenzene and nitrobenzene) over the entire composition range at T = 303.15–318.15 K and at atmospheric pressure 0.1 MPa. The excess properties, such as excess molar volume, excess isentropic compressibility and deviation in viscosity were calculated from experimental data. The excess properties were correlated by the Redlich–Kister equation. The partial molar volumes, partial molar isentropic compressibilities, excess partial molar volumes and excess partial molar isentropic compressibilities were calculated for all the binary systems throughout the composition range and also at infinity dilutions. The V^E results are analyzed in the light of Prigogine–Flory–Patterson theory. Analysis of each of the three contributions viz. interactional, free volume and P* effect to V^E showed that interactional and P* contributions are positive for all systems, the free volume effect is negative for all the mixtures. The variations of these parameters with composition and temperature were discussed in terms of intermolecular interactions prevailing in these mixtures.