The conformation of triphenylbismuthine and tris-(p-chlorophenyl)bismuthine in benzene solution

Abstract

Molar Kerr constant, dipole moment, and dielectric relaxation measurements of (p-C₆H₄Cl)₃Bi in benzene solution indicate a C–Bi–C bond angle of 93 ° and an average rotation (in the same sense) of each C₆H₄Cl group about its C–Bi bond of 45° from a model in which the aromatic planes intersect along the symmetry axis. A similar configuration in solution is likely in the case of Ph₃Bi, for which a C–Bi–C bond angle of 94° has been reported in the solid state.