Studies on sterically hindered tri(α-naphthyl)antimony(V) amide, carboxylate, and oxime derivatives

Several hitherto unreported penta-coordinate tri(alpha-naphthyl)antimony(V) haloimides, haloamines, halocarboxylates and dioximates of the general formulas (alpha-C10H7)(3)SbLX and (alpha-C10H7)(3)SbL2 (where L=amides, amines, carboxylates and oximes; X=halogens) have been prepared by the metathesis reaction of (alpha-C10H7)(3)SbX2 with the appropriate metals salts of the organic ligands. The amide derivatives were also obtained by the addition of N-halo amides to tri(alpha-naphthyl)-antimony(V). The newly synthesised compounds have been characterised by conventional methods. A tentative trigonal bipyramidal structure is suggested for these compounds. The failure to replace the second halogen atom in (alpha-C10H7)(3)SbXL may be attributed to steric hindrance offered by the naphthyl groups bound to antimony as well as the bulky nature of the organic ligand.