Dipole moments and dielectric relaxation times of some dialkyl and diaryl disulphides and diphenyl disulphone

Abstract

Dielectric relaxation times τ and electric dipole moments µ(loss) of nine dialkyl and diaryl disulphides and of diphenyl disulphone have been measured as solutes in benzene at 20° using a standing wave method at frequencies 1·140, 3·040, and 8·540 GHz. In each case the data are well described by a Debye curve and µ(loss) is generally close to the ‘static’ dipole moment. The τ values and the observed Debye behaviour are explained in terms of an overall molecular relaxation process with little apparent contribution from intramolecular rotations about the S–S bond.