Thermodynamics of amine plus ketone mixtures: Volumetric, speed of sound data and viscosity at 303.15 K and 308.15 K for the binary mixtures of N,N-diethylaniline plus aliphatic ketones (C3-C5)+4-methyl-2-pentanone

Measurement of densities (rho), viscosities (eta), and ultrasonic speeds (u) has been carried out for binary mixtures of N, N-diethylaniline (N, N-DEA) with acetone (AC), methylethylketone (MEK), methylpropylketone (MPK), diethylketone (DEK), and methylisobutylketone (MIBK), and their pure liquids at 303.15 K and 308.15 K over the entire composition range. These experimental values have been used to calculate the excess molar volume (V-E), deviation in ultrasonic speeds (Du), deviation in isentropic compressibility (Delta kappa(s)), deviation in intermolecular free length (Delta L-f), deviation in acoustic impedance (Delta Z), excess Gibbs free energy of activation of viscous flow (G(*E)) and deviation in viscosity (Delta eta). The variation of these properties with composition of the mixtures suggests dipole-dipole interactions and charge-transfer complex formation between N, N-diethylaniline and dipolar ketones. The magnitude of the property is found to depend on the chain length of the ketones' molecule. The viscosity data have been correlated using three equations: Grunberg and Nissan, Katti and Chaudhri and Hind et al. These results have been fitted to the Redlich-Kister polynomial using multiparametric nonlinear regression analysis to estimate the binary coefficients and standard errors. (C) 2013 Production and hosting by Elsevier B.V. on behalf of King Saud University.