Ultrasonic speeds, viscosities, refractive indices and FT-IR spectroscopic studies of an oxygenate with aliphatic and aromatic hydrocarbons at 298.15 K and 308.15 K

Intermolecular interactions have been studied for binary mixtures of 1-propanol + cyclohexane, n-hexane, benzene, toluene, o-, m- and p-xylenes by measuring ultrasonic speeds (u), refractive indices (n(D)) and viscosities (eta) over the entire range of composition at 298.15 K and 308.15 K. From these results excess viscosity, refractive index, speed of sound and isentropic compressibility have been calculated. These results are fitted to the Redlich-Kister equation to derive the binary coefficients along with standard deviations between the experimental and calculated data. Acoustic parameter such as isentropic compressibility (K-s(E)), free volume (V-f), available volume (V-a) and Rao constant (R) were also reported. The ultrasonic speeds data were correlated by various correlations like Nomoto's relation, Van Dael's mixing relation and impedance dependence relation. The ultrasonic speed data were further analyzed in terms of Jacobson's free length theory and Schaaff's collision factor theory. The viscosities and refractive indices of these binary mixtures were calculated theoretically from the pure component data by using various empirical and semi-empirical relations and the results were compared with the experimental data. The excess properties were interpreted in terms of molecular interaction between the components of binary mixtures and also confirmed by Fourier Transform infrared (FT-IR) spectroscopy. (C) 2016 Elsevier B.V. All rights reserved.