Tertiary stibines containing aromatic heterocycles and their silver complexes: synthesis and X-ray structures

The work presents the synthesis of tertiary stibines containing heterocycli c aromatic groups of general formula (2-C4H3X)(3)Sb where X = S (1), O (2) or NMe (3). These stibines were brominated to give corresponding dibromide and were complexed with silver(I) nitrate. The stibines, dibromides and the ir silver complexes were characterized by elemental analyses, IR, Uv, mass, H-1, C-13, COSY, HETCOR NMR spectroscopy. Molecular structures of (2-C4H3S )(3)Sb (1); (2-C4H3S)(3)SbBr2 (4) and {Ag[(2-C4H3S)(3)Sb](2)}NO3 (6) were d etermined by X-ray spectroscopy. This is the first X-ray crystallographic r eport on stibines containing heterocyclic aromatic groups and their silver complexes. The stibine (1) is pyramidal while its dibromide has trigonal bi pyramidal structure. The silver complex (6) has a polymeric nature with NO3 acting as a bridging ligand. (C) 2001 Elsevier Science B.V. All rights res erved.