Syntheses and Vibrational Spectra of Some Tris(alkanethiolato)mercurate(II) Complexes, and Crystal Structure of the Hexakis-(methanethiolato)dimercurate(II) Dianion

Article abstract of DOI:10.1071/CH9841607

The complexes (R = Me, cation = Et4N⁺; R = Bu^t, cation = Et4N⁺, Bu4N⁺, ⁺) have been prepared.The crystal structure of the methanethiolate complex shows that it contains centrosymmetric dinuclear anions <(MeS)2Hg(μ-SMe)2Hg(SMe)2>^2- with distorted tetrahedral geometry about the mercury atoms.Vibrational spectroscopic evidence suggests that this complex dissociates on dissolution in ethanol to give mononuclear ^- species.The Bu^tS^- complexes appear to exist as mononuclear t)3>^- species both in the solid state and in solution.The metal-sulfur stretching frequencies are assigned for all of the complexes studied, and the vibrational spectra are discussed in terms of the structures of the complex anions involved.Crystal data for <(C2H5)4N>2Hg2(SCH3)6: a 8.656(5), b 9.130(6), c 12.368(8) Angstroem; α 102.16(4), β 105.51(4), γ 105.29(4) deg; space group P<*>, Z 1, R 0.034, R_w 0.042.