Tris(dimethyldithioarsinato) complexes of group 15 metals, M(S₂AsMe₂)₃ [M = (As), Sb, Bi]

Article type: Research Article

Authors: Ioannou, Panayiotis V. | Vachliotis, Dimitris G.

Affiliations: Department of Chemistry, University of Patras, Patras, Greece

Note: [] Corresponding author: P.V. Ioannou, Department of Chemistry, University of Patras, Patras, Greece. Fax: +30 2610 997118; E-mail: [email protected]

Abstract: The reaction of sodium dimethyldithioarsinate dihydrate with arsenic trichloride did not afford the expected six-coordinate arsenic complex but mostly the Bunsen's cacodyl disulfide, Me2As(S)-S-AsMe2. However, with antimony trichloride and bismuth nitrate pentahydrate, the anhydrous tris(dimethyldithioarsinato) complexes were obtained essentially without the co-production of Bunsen's cacodyl disulfide. Both complexes did not coordinate water molecules (by IR), but hydrates were detected in CDCl3. The antimony, but not the bismuth, complex efficiently competes with DMSO in attracting hydrate waters.

Keywords: Sodium dimethyldithioarsinate dihydrate, dimethyldithioarsinic acid, arsenic(III), antimony(III), bismuth(III), water polarization

DOI: 10.3233/MGC-120079

Journal: Main Group Chemistry, vol. 11, no. 4, pp. 267-273, 2012