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

Abstract

The electric dipole moments of benzyl benzoate, 2-naphthyl benzoate, o-hydroxybenzyl benzoate, and methyl bromoacetate at a frequency of 1 MHz and relaxation times at a frequency of 9·80 GHz have been determined in benzene at 30 °C. A comparison of µ_calc and µ_obs shows that there is no free rotation in the ester molecules. However the results indicate the possibility of a restricted rotation of the –OR² group about the position of minimum potential energy.