Study of molecular interactions in binary mixtures of acetophenone derivative and cyclohexylamine

摘要

Dielectric constant of cyclohexylamine (CHA) + acetophenone (ACT) and CHA + p-chloroacetophenone (PCLA) mixtures has been measured at 100 KHz at 30 degrees C. The Kirkwood correlation factor g(eff) and g(f), excess thermodynamic functions and excess polarization of mixing have been calculated. The values of correlation factors in the mixture remain above unity, which indicated the predominance of microheterogeneous cluster with parallel or cooperative angular correlation (alpha-cluster). The dipolar contribution of excess free energy of mixing, arising from long-range electrostatic interaction and short-range interaction between identical molecules and short-range interaction between dissimilar molecules, has been calculated separately. For both the systems, the excess viscosity exhibits negative deviation due to hydrogen bonded effects and dipolar interaction.