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.