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 ?
u, deviation in isentropic compressibility ?
κ s , and deviation in viscosity ?
η. 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.
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