Molecular polarisability. Some chlorinated cyclohexanes

Abstract

Dipole moments and molar Kerr constants are reported for cis-, and trans-1,2-dichlorocyclohexane, 1,1,2-trichloro-cyclohexane, and the α-, γ-, δ-isomers of 1,2,3,4,5,6-hexachlorocyclohexane as solutes in carbon tetrachloride and for β-1,2,3,4,5,6-hexachlorocyclohexane as a solute in benzene. Our measurements suggest that the di- and tri-chloro-solutes exist as mixtures of chair and twist boat conformations in which the latter are predominant. For α- and γ-hexachlorocyclohexane, the experimental observations can be explained by the presence of twist boat–chair mixtures or by ‘distorted’ forms, while for the δ-isomer, a ‘distorted’ chair is indicated. β-Hexachloro-cyclohexane appears to adopt the traditional chair arrangement with all chlorine atoms equatorially disposed.