Dipole Moments, Kerr Effects, and Polarography

Dipole moment and Kerr effect measurements are frequently used for conformational analyses, e,g., the recent studies of the phosphepanes (88) and 1,3,2,5-dioxasilaphosphorinanes (89). On the other hand the anisotropy of polarization and conformational analysis of triphenylphosphine, trimesityl-phosphine, and their chalcogenides also incorporated Raleigh scattering measurements (c/. ref. 236), whilst conformation studies of 1,3,5-dioxaphosphorinanes combined dipole moments with n.m.r. or u.v. data or reactive field calculations.  

Other phosphoryl compounds which have been studied through their dipole moments are the vinyl- and substituted benzyl- diphenylphosphine oxides. 

Polarography has been used to anal) e the role of amine catalysts in phos-phonate hydrolyses. Voltammetry data is reported for triphenylphosphine sulphide triethyl phosphorothioate and various triphenylphosphonium salts and ylides.  

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