... (12) LJ Bellamy, “The Infra-red Spectra of Complex Molecules,” John (13) Because of the insolubility of VIIIb in nearly all organic solvents, Wiley ... for the preparation of compounds of the type [RaP=N=S(+O)Rs']+ C1-; see TW Rave and TJ Logan, J . Ore. Chem., 84, 1629 (1967). ...