Molecular reorientation and molecular association. Study by Raman depolarised light scattering

Abstract

A depolarized Raman light scattering study of chloroform +p-dioxan, chloroform + benzene and benzene +p-dioxan mixtures has been carried out. The overall molecular reorientational correlation times of the two components in the three mixtures exhibit similar concentration dependence: as the mole fraction of one component increases its reorientational relaxation times decrease, indicating that the motion of each component in solution is slower than in the neat liquid. The solution compositions at which the orientational motion of the two components becomes correlated indicate formation of a loose 1 : 1 complex of chloroform + benzene and benzene +p-dioxan, and a 2 : 1 complex of chloroform +p-dioxan.