A Novel Synthesis of AlCl[(NPh)₂P(O)H] and SiCl₂[(NPh)₂P(O)H]: Two New Phosph(V)azane Derivatives

Reactions of phosph(V)azane derivatives of bis(anilino)phosphine oxide (PhNH)₂P(O)H (1) with AlCl₃ and SiCl₄ produce two new phosph(V)azane complexes, AlCl[(NPh)₂P(O)H] (2) and SiCl₂[(NPh)₂P(O)H] (3). In these reactions, an HCl elimination occurs and M─N bonds (M = Si, Al) form directly between a bis(anilino)phosphine oxide ligand with aluminum and silicon halides. The reactions do not require any base to deprotonate the phosphazane ligand. The final products have been fully characterized by means of elemental analysis and IR, MS, and multinuclear NMR (¹H, ¹³C, ³¹P, ²⁷Al, and ²⁹Si) spectroscopy.

Keywords:

• ²⁷Al NMR
• aluminum halides
• bis(anilino)phosphine oxide
• phosph(V)azane derivatives
• silicon halides

Support of this work by the Shahid Chamran University, Ahvaz, Iran (project No. 217) is gratefully acknowledged.