Tertiary phosphine and arsine chalcogenide derivatives of Group VI metal carbonyl complexes

Abstract

The preparation of a series of complexes [M(CO)₅L][M = Cr or W; L = Me₃PS, Me₂PhPS, MePh₂PS, Ph₃PS, Me₂PhPSe, Me₃AsS, or Ph₂P(S)CH₂P(S)Ph₂; M = Mo, L = Me₂PhPS; M = W, L = Ph₃AsO] is reported. I.r. and ¹H n.m.r. spectra are discussed. The chalcogenide ligands are readily displaced by CO and Ph₃P, and with Mel ionic species, e.g.[Me₂PhPSMe][M(CO)₅l], are formed. For L = Ph₂P(S)CH₂P(S)Ph₂ spectroscopic evidence indicates the ligand is acting in a monodentate fashion.