Molecular interactions between amine and cyclic ketones at different temperatures

Abstract

Measurement of densities ρ, viscosities η, and ultrasonic speeds u has been carried out for binary mixtures of N,N-diethylaniline (N,N-DEA) with acetophenone, cyclopentanone, cyclohexanone (CH), and 2-methylcyclohexanone (Me-CH) and their pure liquids at (303.15 and 308.15) K. These experimental data have been used to calculate the excess molar volume V E, deviation in ultrasonic velocity Δu, deviation in isentropic compressibility Δκ s, and deviation in viscosity Δη. 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 (Nature 164:799-800, 1949), Katti and Chaudhri (J Chem Eng Data 9:442-443, 1964), and Hind et al. (Trans Faraday Soc 56:328-330, 1960). These results have been fitted to the Redlich-Kister polynomial using multiparametric nonlinear regression analysis to estimate the binary coefficients and standard errors. © 2013 The Author(s).