Organotin(IV) derivatives of 2-acetylpyridine-N(4)-phenylthiosemicarbazone, HAP4P, and 2-hydroxyacetophenone-N(4)-phenylthiosemicarbazone, H(2)DAP4P.Crystal and molecular structure of [SnMe2(DAP4P)] and [SnBu2(DAP4P)]

The reactions of 2-acetylpyridine-N(4)-phenylthiosemicarbazone, HAP4P, and 2-hydroxyacetophenone-N(4)-phenylthiosemicarbazone, H(2)DAP4P, with R4-mSnX m (m = 2, 3; R = Me, Bu-n, Ph and X = Cl, Br) led to the formation of hexa- and penta-coordinated organotin(IV) complexes, which were studied by micro analysis, IR, H-1-NMR and Mossbauer spectroscopies. The molecular structure s of [SnMe2(DAP4P)] and [(SnBu2)-Bu-n(DAP4P)] were determined by single-cry stal X-ray diffraction studies. In the compounds [SnClMe2(AP4P)] and [SnBrM e2(AP4P)], the deprotonated ligand AP4P(-) is N,N,S-bonded to the Sn(IV) at oms, which exhibit strongly distorted octahedral coordination. The structur es of [SnMe2(DAP4P)] and [(SnBu2)-Bu-n(DAP4P)] revealed that the DAP4P(2-) anion acts as a O,N,S-tridentate ligand. In these cases, the Sn( IV) atoms adopt a strongly distorted trigonal bipyramidal configuration where the azo methine N and the two C atoms are on the equatorial plane while the O and t he S atoms occupy the axial positions.