Dielectric relaxation of diethylsulfoxide

The dielectric loss spectrum of the title substance has been measured in it s pure liquid state between 10 MHz and 72 GHz at 20 degrees C. In compariso n to the Debye function, it is slightly broadened towards the high frequenc y side. The maximum corresponds to a relaxation time of 51 ps. In view of t he molecular size and viscosity, this is relatively long and thus indicativ e of associative intermolecular effects as ih the case of the homologous co mpound dimethylsulfoxide.