Dielectric relaxation of rigid solute molecules in benzene + paraffin solutions

Abstract

The dielectric relaxation of six rigid polar solute molecules over a 40°C temperature range (20–60°C) has been studied as a function of the solvent composition (benzene + liquid paraffin mixtures).The thermodynamics of the relaxation processes are examined, compared with corresponding results for viscous flow of the solvents, and inferences drawn about the structure of the solvent and the nature of the relaxation process.The effects of solute dimensions and solvent viscosity upon the relaxation times are examined and an equation proposed to relate these factors.