Bonds to Silicon or Germanium

Burger, J. Cichon, R. Demuth, J. Grobe, and F. Hofler, Spectrochim. Acta, 1974, 30A, 1977. 

Ready cleavage of the P—Si bond makes compounds such as (CF3)2PSiR3 useful reagents for the preparation of new compounds containing the (CF3)2P group, and thus provides a direct and efficient route to silylphosphines with R = H or In a similar way BujPSiMes reacts readily with both SiCU and GeCU to 

1 1 Addition compounds form between aluminium chloride and the silylphosphines Me3SiPEt2 or Me H3 SiPMe2, which on heating lose methylsilyl chloride, giving trimeric aluminium-phosphorus heterocycles such as (29). The thermolysis product from the adduct Me3SiPMe2,H2AlCl is similar to (29), but the 

Silylphosphines can add across the C==N bond in aldimines as shown in equation (42) to produce compounds containing an Si—N—C—P atom sequence further reactions with di-imines and N-acylimines have also been reported.  

The reaction between white phosphorus, MesSiCl, and a mixture of sodium and potassium in either mono- or di-glyme as solvent provides a simple method for preparing the tertiary phosphine (Me3Si)3P. Scrambling reactions of the latter with MeiGeCl and Me3SnCl lead to all ten possible products, which can be identified by P n.m.r. spectroscopy.  

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