Dielectric studies. Part 5.—Two relaxation processes of cyclopentanone, tetrahydrofuran and thiacyclopentane

Abstract

Dielectric absorption studies have been carried out on solutions of tetrahydrofuran, thiacyclopentane and cyclopentanone in cyclohexane at five microwave frequencies. An appreciable discrepancy between the dipole moments evaluated by the microwave and heterodyne beat approaches may be accounted for by high atomic polarization contributions. The dielectric data for each molecule have been analyzed in terms of two processes, one of which is identified as re-orientation about a principal axis. Possible processes for the other relaxation time have been considered.