Unusual group 14 metal thiolates and sulphides derived from tris(trimethylsilyl)methanethiol; X-ray structures of [Pb(NR2)(µ-SCR3)]2 and cis-[Ge(CH2Ph)(NR2)(µ-S)]2, (R = SiMe3)

Abstract

The reaction of tris(trimethylsilyl)menthanethiol, HSCR₃(R = SiMe₃), with a group 14†; metal(II) bis(trimethylsilyl)amide, M(NR₂)₂(M = Ge or Pb), gives unexpected products: cis- and trans-[Ge(CH₂Ph)(NR₂)(µ-S)]₂[a rare example of a group 14 cyclodi(metalthiane), {MXX(µ-S)}₂, by refluxing in PhMe]; [Pb(SCR₃)(µ-SCR₃)]₂(the new ligand SCR₃ evidently can function in both a terminal and a bridging fashion); and [Pb(NR₂)(µ-SCR₃)]₂, the first simple prochiral group 14 metal(II) complex.