A From Amides and Phosphorus v Halides

From Amides and Phosphorus(v) Halides.—The Kirsanov reaction remains one of the most important routes to acyclic phosphazenes some recent examples of this reaction are summarized below  

An interesting feature of the i.r. spectra of these compounds was that the intensity of the C=N absorption was relatively low and, to account for this, an interaction of the type shown with (1) was suggested. With phos- 

Monophosphazenes may also be obtained by elimination of hydrogen fluoride in the presence of a tertiary base  

Diamides, R(CONH2 2 [R = -CCI2-, -CCljfCHala.sCCla-], give diphos-phazenes in a predictable manner  

The products were further characterized by their hydrolysis [initially to RfCONHPOClala], aminolysis, alcoholysis, and thioalcoholysis products. 

---