molecular interaction and dielectric relaxation studies of cycloalcohols with acetamide in a non-polar solvent using frequency domain technique

Research Article
S. Kumara*, S. Sivakumarb and P. Jeevanandhama
Acetamide, Cycloalcohols, dielectric relaxation and molecular interaction.

The molecular interaction and dielectric relaxation studies were carried out between Cycloalcohols such as cyclopentanol, cyclohexanol and cycloheptanol with Acetamide in 1,4-dioxane. The experiment was carried out by using X-band (9.34GHz) and Jband (7.22GHz) microwave benches at 303K. The dielectric constants of the solutions were measured by using a Dipole meter DM01 operating at a frequency of 2 MHz. From the derived dielectric parameters like ε0, ε∞, ε', ε'', the dipole moment (μ) by both Onsager and Higasi’s methods are compared and the excess properties (VE,ηE) were determined. The Kirkwood correlation factor (g') were also calculated. g' described something about the orientational ordering of molecules in a liquid through the angular correlations of neighboring dipoles and hence a measurement of g' would give useful information about the local structure of the liquid. The relaxation times (τ) by Higasi’s method for both binary and ternary liquid mixtures were calculated. From the ternary results it is observed that the relaxation time is found to be maximum at 1:1 complexes. Further it is evident from our data that the molar free energy of activation for viscous flow (ΔFη) is greater than that of the free energy activation for relaxation time (ΔFτ).