Densities, ultrasonic speeds and refractive indices of phenetole with N-methyl-2-pyrrolidone, N,N-dimethylformamide and tetrahydrofuran binary mixtures at different temperatures

• Densities, ultrasonic speeds and refractive indices of phenetole + NMP, DMF and THF binary mixtures were evaluated.
• Excess molar volumes, isentropic compressibilities, refractive indices and ultrasonic speed deviation of these mixtures were calculated.
• The ultrasonic speeds were analyzed in term of CFT, FLT, NR and IMR.
• Excess and deviation properties were fitted to Redlich-Kister least square method.
• The results were interpreted on possible molecular interactions between components as well as the effect of polarity.

Densities, ultrasonic speeds and refractive indices of phenetole (ethoxy benzene or ethyl phenyl ether) with N-methyl-2-pyrrolidone (NMP), N,N-dimethylformamide (DMF) and tetrahydrofuran (THF) binary mixtures over the entire mole fraction range were measured at (298, 303 and 308) K and atmospheric pressure. Excess molar volumes, isentropic compressibilities, refractive indices and ultrasonic speed deviation of these mixtures were calculated. The ultrasonic speeds have been analyzed in term of Schaaffs’ collision factor theory (CFT), Jacobson’s intermolecular free length theory of solutions (FLT), Nomoto relation (NR) and Van Deal ideal mixture relation (IMR). Excess and deviation properties were fitted to the method of least square of the Redlich-Kister (R-K) polynomial to estimate the coefficients and standard deviations. The results were interpreted on possible molecular interactions between components as well as the effect of polarity.