名称:
Ligand exchange reactions of ReCl4(PPh3)2, ReOCl3(PPh3)2 and NiCl2(PPh3)2 with acetylacetone thiobenzoylhydrazone. An unexpected template reaction at the ReO3+ core. Molecular structures of the resulting oxorhenium(V) and nickel complexes
摘要:
The ligand exchange reactions of ReCl4(PPh3)(2), ReOCl3(PPh3)(2) and NiCl2(PPh3)(2) with acetylacetone thiobenzoylhydrazone have been studied. An unexpected template reaction at the ReO3+ core forming the new tetradentate triacidic ligand triacetylmethane bis(thiobenzoylhydrazone) will be described and discussed. The final products were characterized by elemental analysis, mass spectroscopy, H-1 NMR, IR, W-VIS spectroscopy and X-ray structural analysis. [Acetylacetone thiobenzoylhydrazonato(2-)]chloro-oxorhenium(V) was isolated as an intermediate. The crystal structures have been determined cf [triacetylmethane bis( thiobenzoylhydrazonato) (3-)-S,S',N,N'] oxorhenium(V) C21H19N4O2S2Re, monoclinic P2(1)/m, a = 7.451 (1), b = 11.262(3), c = 12.639(4) Angstrom, beta = 90.66(2)degrees, Z = 2, R-1 = 0.0445, and [acetylacetone thiobenzoylhydrazonato(2-)]-triphenylphosphane-nickel (II) C30H27N2OSPNi, orthorhombic Pbca, a = 16.658(2), b = 14.725(2), c = 21.950(2) Angstrom, Z = 8, R-1 = 0.0283. (C) 1998 Elsevier Science S.A. All rights reserved.