Formation of a Germylyne Complex: Dehydrogenation of a Hydrido(hydrogermylene)tungsten Complex with Mesityl Isocyanate

摘要

The heavier analogues of transition-metal carbyne complexes are attractive synthetic targets for research in fundamental organometallic and main-group chemistry. Over the last 15 years, the syntheses of a series of complexes with M ≡ E bonds (E = Si, Ge, Sn, Pb) have been achieved, but examples are few. These complexes were synthesized by employing a base-stabilized halosilylene and stable divalent Group 14 element halides for E = Ge, Sn, or Pb as precursors. For example, Power and Simons reported the first example of this type of complex, [Cp(CO)2Mo = Ge(C6H3-2,6-Mes2)] (Mes = mesityl = 2,4,6-trimethyIphenyl), which was obtained by salt elimination from a germanium(II) chloride GeCl(C6H3-2,6-Mes2) and an anionic complex Na[MoCp(CO)3] .