Solute-solvent interactions in chloroform solutions of halogenated symmetric double Schiff bases of 1,1'-bis(4-aminophenyl)cyclohexane at 308.15 K according to ultrasonic and viscosity data

摘要

The density, viscosity and ultrasonic speed (2 MHz) of chloroform solutions of halogenated symmetric double Schiff bases of 1,1'-bis(4-aminophenyl)cyclohexane were investigated at 308.15 K. Various acoustical parameters such as specific acoustical impedance (Z), adiabatic compressibility (De (a)), Rao's molar sound function (R (m)), van der Waals constant (b), internal pressure (pi), free volume (V (f)), intermolecular free path length (L (f)), classical absorption coefficient (alpha/f (2))(Cl)) and viscous relaxation time (tau) were determine using ultrasonic speed (U), viscosity (eta) and density (rho) data of Schiff bases solutions and correlated with concentration. Linear increase of Z, b, R, tau, and (alpha/f (2))(Cl) except pi (nonlinear) and linear decrease of De (a) and L (f) except V (f) (nonlinear) with increasing concentration of Schiff bases suggested presence of strong molecular interactions in the solutions. The positive values of solvation number further supported strong molecular interactions in the solutions. The nature and position of halogen substituent also affected the strength of molecular interactions.