UNUSUAL COORDINATION CHEMISTRY OF ORGANOALUMINUM AND ORGANOGALLIUM COMPLEXES IN N2S AND NS COORDINATION ENVIRONMENTS - SYNTHESIS AND CRYSTAL-STRUCTURE OF (ME2AL)[NC5H4CMENNC(S)NC3H7](ALME2) AND (ME2GA)[PHMECNNC(S)NPH](GAME2)

The synthesis and characterization of the dinucl ear group 13 heterocy clic carboxaldehyde thiosemicarbazone complexes (Me2M)[NC5H4CMeNNC(S)N R](MMe2) (M = Al, R = Me (1), (C3H7)-C-i (3), Ph (5); M = Ga, R = Me ( 2), (C3H7)-C-i (4), Ph (6)) and acetophenone thiosemicarbazone complex es (Me2M)(CH3RCNNC(S)NR')(MMe2) (M = Al, R = Ph, R' = Ph (7); M = Al, R = CH3, R' = CH, (9); M = Ga, R = Ph, R' = Ph (8); M = Ga R = CH3, R' = CH3 (10)) are described. Compounds 1-6 were prepared by the reactio n of MMe3 (M = Al, Ga) with 2-acetylpyridine 4-alkylthiosemicarbazone in toluene. Compounds 7-10 were prepared using MMe3 (M = Al, Ga) in to luene with acetophenone 4-alkylthiosemicarbazone under anaerobic condi tions. These compounds, 1-10, have been characterized by microanalysis , NMR (H-1, C-13, Al-27) spectroscopy, and single-crystal X-ray diffra ction. X-ray single-crystal diffraction analyses reveal that compound 3 is a dinuclear aluminum compound with coordination numbers of five a nd four and compound 8 is a dinuclear gallium compound in which each g allium atom is four-coordinate.