New Phosph(V)azane Ligand as a Bidentate Donor in the Synthesis of One Novel Organometallic Tin(IV) Compound

The new ligand {[(C6H5NH)P(O)H](NC6H5)[(C6H5NH)P(O)H]} ( 2 ) was synthesized by heating bis(anilino)phosphine oxide (C6H5NH)2P(O)H ( 1 ) at 110°C and elimination of aniline. The treatment of 2 with SnBu2 Cl2 in the presence of triethylamine (TEA) in dry THF yielded the novel compound Bu n 2Sn{[Et3NH(NPh)P(O)H](NPh)p(O)H]}2 ( 3 ) in which the phosphazane ligand acts as a bidentate ligand. The products have been characterized by means of elemental analysis, IR, MS, and multinuclear NMR ( 1H, 13C, 31P, and 119Sn) spectroscopy. The spectroscopic data are consistent with the bounding of the phosph(V)azane ligand through both oxygen and phosphorus atoms to Sn(IV) center in the final compound 3 . TEA is used as a base in order to deprotonate the phosphazane ligand and is separated as Et3 NH + Cl − , whereas HTEA + exists in the title product 3 and is acting as a charge balancing and H-bond structure directing agent.