Dielectric Relaxation Studies of Trihalogenated Esters in Different Solvents at Microwave Frequency

Abstract

Abstract The dielectric permittivity ε′ and dielectric loss ε″ have been measured at 9.83 GHz for the solutions of four trihalogenated esters in six non-polar solvents having wide range of viscosities at 35 °C. The static permittivity ε0 at 1 MHz and high frequency limiting permittivity ε∞=nD2 have also been measured at 35 °C. The normalized plots of logτ vs. logη for these esters are linear for non-interacting solvents only. The anomalous behaviour of these solutes in other solvents has been explained in terms of solute-solvent interactions. The distribution parameter α, the free energies of activation ΔFτ, ΔFη and the dipole moment μ of these esters have also been reported.