Abstract
Using standard microwave techniques, the dielectric constant e ′ and dielectric loss e ′′ for dilute solutions of Dimethylsulphoxide (DMSO) in benzene and carbontetrachloride (CCl 4 ) have been measured at 9.174 GHz at different temperatures (25, 30, 35 and 40°C). Following the single frequency concentration variational method suggested by Gopalakrishana, the dielectric relaxation time τ and dipole moment µ at various temperatures have been calculated. Based on above studies, monomer structure for DMSO in both the solutions have been inferred. The presence of solute-solvent association in both the solutions have been proposed. Dielectric relaxation process can be treated as the rate process just like the viscous flow process. Energy parameters for the dielectric relaxation process have been calculated and compared with the corresponding energy parameters for the viscous flow.
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