Mononuclear oxo thiolato compounds of molybdenum(V)

Abstract

The intensely blue salts B⁺ [MoO(SAr)₄]^- (B⁺ = quaternary cation; Ar = phenyl, p-tolyl) have been isolated. Magnetic susceptibility, e.s.r., conductance and electronic spectral data indicate that the complexes are essentially mononuclear both in the solid state and in solution. The solution electronic spectra exhibit an intense maximum at 598 nm, which is tentatively assigned to a sulphur-to-molybdenum charge- transfer transition.