Phosphorus–nitrogen compounds. Part XL. The hydrogen halide-induced deaminolysis of hexakisdimethylaminocyclotriphosphazatriene and the cis–trans-isomerisation of halogenodimethylaminocyclotriphosphazatrienes

Abstract

The reaction of hexakisdimethylaminocyclotriphosphazatriene, N3P3(NMe2)6, with hydrogen chloride in boiling xylene gives cis-N3P3Cl2(NMe2)4, cis- and trans-N3P3Cl3(NMe2)3. The analogous reaction with hydrogen bromide proceeds faster, gives low yields of similar products, but is accompanied by extensive decomposition. With hydrogen iodide only N3P3(NMe2)6,HX (X = I or I3) are isolated. cis- and trans-Derivatives of N3P3X3(NMe2)3 and N3P3X4(NMe2)2(X = Cl or Br) can be reversibly isomerised with the appropriate, hydrogen halide. The mechanisms of the above reactions are discussed.