Molecular Interactions in Solutions of 1,1-Bis(4-(2-oxopropoxy)phenyl)cyclohexane on Ultrasonic Velocity, Density, and Viscosimetric Data

The ultrasonic velocity, density, and viscosity are measured at various concentrations 0.1–0.01 mol dm^–3 in the solutions of 1,1-bis(4-(2-oxopropoxy)phenyl)cyclohexane (BMAPC) in 1,4-dioxane (DO), ethyl acetate (EA), tetrahydrofuan (THF) at 298–313 K and at atmospheric pressure. Parameters: acoustical impedance, adiabatic compressibility, Rao's molar sound function, Van der Waals constant, internal pressure, free volume, intermolecular free path length, classical absorption coefficient and viscous relaxation time, Gibbs free energy of activation, enthalpy of activation and entropy of activation were determined. Change of the parameters with T indicated existence of strong molecular interactions in solutions and further supported by positive values of solvation number. Gibbs free energy of activation decrease linearly with increasing C and T in the DO system while it decreases with C and increase with T in EA and THF. Enthalpy and entropy of activation were found to be slightly concentration dependent.