Bonds to Silicon, Germanium, or Tin

Similar displacement reactions occur with BujPSiMcs on treatment with chlorinated methylsilanes and chloromethyl-stannanes. In the first instance three 

Monolithiated silylphosphines that are useful as intermediates are readily obtained by the action of butyl-lithium on tris(trimethylsilyl)phosphine. The crystalline product obtained is (Me3Si)2PLi, solvated with one mole of glyme or triglyme. 

Bonds to Silicon, Germanium, or Tin.—Experiments in the presence of McgSiDg show that the thermal decomposition of silylphosphin follows 

The biradicals then insert into the Si—bonds to give, respectively, MejSiaHgDa and MeaSiPHDg. 

Germyl- and silyl-phosphines add readily to one of the carbonyl groups of glyoxal to give unstable products which readily lose carbon monoxide, e.g. 

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