Electric dipole moment and relaxation time of some ester molecules in benzene. Part II

Abstract

Electric dipole moments of ethyl phenylacetate, 2-naphthyl acetate, benzyl cinnamate, methyl cinnamate, and diethyl bromomalonate at a frequency of 1 MHz and relaxation times at 9·80 GHz have been determined in benzene at 30 °C. A comparison of µ_obs and µ_calc shows the absence of free rotation from these molecules except for diethyl bromomalonate and restricted rotation of the –OR₂ group about the position of minimum potential energy is more probable.