Amino-, Alkyl, and Aryl derivatives

Returning to the phosph(v)azenes, the reactions of Ph3P=NH with various acid halides have been examined in some detail 71 

Phosphazenes of the type R1R22P=NH (R1 and R2 = alkyl or aryl) readily add to trihalogenoacetonitriles 49 

There have been several reports of reactions which involve cleavage of the Si—N bond in N-silylphosphazenes. Thus Et3SiX (X = F or Cl) can be used to prepare triethylsilyl-derivatives by fra/w-silylation 73 

Alk3P=NLi + ClSiMe2SiMe3 p Alk3P=NSiMe2SiMe3 Alk3P + N3SiMe2SiMe3 (34) 

Other reactions include insertion of S03 into the Si—N bond and formation of di- 

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