Orientational order in dipolar liquids

Light scattering experiments and NMR relaxation measurements have been performed on liquid nitrobenzene, and on mixtures of nitrobenzene with benzene and carbon tetrachloride. The results indicate that local order prevails in pure nitrobenzene, and that the nitrobenzene-benzene mixtures have an ordered microstructure, whereas mixtures with carbon tetrachloride are disordered. The relevance of these measurements to the microstructure of aromatic dipolar liquids is discussed.