DIELECTRIC-PROPERTIES OF MIXTURES OF ACETYLENE TETRACHLORIDE WITH TOLUENE AND ACETONE

Relative permittivities epsilon are reported for binary liquid mixture s of acetylene tetrachloride (ATC) with toluene and acetone at 35-degr ees-C. Measurements of refractive indices have also been made for the mixtures. The values of the quantity DELTAepsilon, the deviations of t he relative permittivities of these mixtures from ideality, have been calculated. The negative values of DELTAepsilon obtained for ATC + tol uene mixtures may be explained as being due to a decrease in the degre e of alignment of the molecular dipoles with changing composition of t he mixture, whereas the positive values of DELTAepsilon obtained for A TC + acetone mixtures are attributed to the formation of molecular com plex between acetone and CHCl2CHCl2. The values of the Kirkwood correl ation parameter g for both sets of mixtures have been calculated using the relative permittivity data.