Molecular polarisability. The dipole moments and molar Kerr constants of some para-substituted anisoles

Dipole moments and molar Kerr constants are reported for the molecules p-XC6H4·OMe (X = H, Me, Cl, Br, l, NO2, or CN) examined as solutes in carbon tetrachloride and benzene. The experimental data are analysed to indicate that (a) the Car–O–C group is virtually coplanar with the aromatic ring if X = NO2 or CN; for X = H, Me, or halogen, the apparent dihedral angle between the planes is ca. 20°(b) stereospecific benzene–solute complex formation occurs in the aromatic solvent.