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Keywords:

  • Adducts;
  • Bonding;
  • Cyclodiphosphazenes;
  • Phosphorus;
  • Polymeri­zation;
  • Polyphosphazenes;
  • Structure elucidation

Abstract

The reaction of R1R2PCl (R1 = Me, Ph; R2 = Ph, oTol) with N,N′-bis(trimethylsilyl)sulfur diimide in the presence of GaCl3 yields Lewis acid/base adducts of the corresponding cyclodiphosph(V)azenes: [MePhPN]2·(GaCl3)2, [Me(dmp)PN]2·(GaCl3)2 (dmp = 2,6-dimethylphenyl), and [Ph(oTol)PN]2·(GaCl3)2. The same synthetic protocol was applied for the model compound Ph2AsCl. All isolated products were characterized spectroscopically and by single-crystal X-ray diffraction studies. Their ability to form oligomers/polymers induced by abstraction of the Lewis acid was investigated with the model compounds [MePhPN]2·(GaCl3)2 and [Ph2PN]2·(GaCl3)2.