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Keywords:

  • Chelates;
  • N,P,S Ligands;
  • Phosphazenes;
  • Zinc

Abstract

The (iminophosphoranyl)(thiophosphoranyl)methane zinc complexes [{(PPh2=NSiMe3)(PPh2=S)CH2}ZnX2] (X = Cl, I) have been obtained by the reaction of {CH2(PPh2=NSiMe3)(PPh2=S)} with the corresponding zinc dihalides ZnCl2 and ZnI2. The (iminophosphoranyl)(thiophosphoranyl)methane ligand coordinates as a bidentate ligand through the nitrogen and sulfur atoms to the zinc atom to form a six-membered metallacycle (N–P–C–P–S–Zn). The reaction of {CH2(PPh2=NSiMe3)(PPh2=S)} with [Zn{N(SiMe3)2}2] and ZnPh2 resulted in the (iminophosphoranyl)(thiophosphoranyl)methanide complexes [{(PPh2=NSiMe3)(PPh2=S)CH}Zn{N(SiMe3)2}] and [{(PPh2=NSiMe3)(PPh2=S)CH}ZnPh], respectively. In addition to the coordination of the phosphinimine nitrogen and sulfur atoms to the zinc atom, a long contact between the methine carbon atom of the P–C–P bridge and the zinc atom was observed in these complexes. The solid-state structures of all the new compounds were established by single-crystal X-ray diffraction.