DIELECTRIC-RELAXATION STUDIES OF SOME KETONES IN NONPOLAR-SOLVENTS ATDIFFERENT TEMPERATURES

The dielectric constant (epsilon') and the dielectric loss (epsilon'') at 9.33 GHz, the static permittivity (epsilon(0)) and the high freque ncy limiting permittivity (epsilon(infinity)) of Phenazone and 2-Butan one in Benzene and of Diphenyl carbazone in 1,4-Dioxane have been dete rmined at 30, 40, 50 and 60 degrees C. The relaxation time and the dip ole moment values have been calculated from the experimental data by e mploying different methods, and the results have been interpreted in t erms of dipole reorientation by molecular and intramolecular rotations . Thermodynamic parameters have also been calculated for the dielectri c relaxation as well as for the viscous flow processess from the measu red dielectric data. Observed values of the Debye's factor and the Kal man's factor show that Kalman's formula satisfactorily explains the re lationship between the dielectric relaxation time and the viscosity. T he enthalpy ratio for the dielectric relaxation and viscous flow comes out to be greater than 0.55, suggesting the absence of any solid rota tor phase in these molecules.