Studies of intermolecular interactions in binary mixtures of 2-chloroaniline with selected di- and tri-substituted benzenes

Abstract

Excess molar volume (VE), excess isentropic compressibility (κsE), viscosity deviation (8η) and excess Gibbs free energy of activation of viscous flow (G*E) for binary mixtures of 2-chloroaniline (CA) with 1,2-dichlorobenzene (1,2-DCB), 1,3-dichlorobenzene (1,3-DCB), and 1,2,4-trichlorobenzene (1,2,4-TCB) at selected compositions were determined from the measured values of densities, speeds of sound, and viscosities of pure components and their mixtures at 303.15, 308.15, 313.15 and 318.15K and atmospheric pressure. The excess molar volumes, excess isentropic compressibilities, viscosity deviation and excess Gibbs energy of activation of viscous flow have been analyzed in terms of interactions arising due to structural effect, charge-transfer complexes and dipole–dipole interaction between unlike molecules. The viscosity data have been correlated with Grunberg and Nissan, Katti and Chaudhri, Hind et al., and Heric–Brewer equations and the results are compared with the experimental results. The excess parameters have been fitted to the Redlich–Kister polynomial equation using multi-parametric nonlinear regression analysis to derive the binary coefficients and to estimate the standard deviation.