engleski

Novel Dioxomolybdenum(VI) and Oxomolybdenum(V) Complexes with Pyridoxal Thiosemicarbazone Ligands: Synthesis and Structural Characterisation

New molybdenum complexes were prepared by the reaction of [MoVIO2(acac)2] or (NH4)2[MoVOCl5] with different N-substituted pyridoxal thiosemicarbazone ligands (H2L1 = pyridoxal 4- phenylthiosemicarbazone ; H2L2 = pyridoxal 4- methylthiosemicarbazone, H2L3 = pyridoxal thiosemicarbazone). The investigation of monomeric [MoO2L1(CH3OH)] or polymeric [MoO2L1-3] molybdenum(VI) complexes revealed that molybdenum is coordinated with a tridentate doubly- deprotonated ligand. In the oxomolybdenum(V) complexes [MoOCl2(HL1-3)] the pyridoxal thiosemicarbazonato ligands are tridentate mono- deprotonated. Crystal and molecular structures of molybdenum(VI) [MoO2L1(CH3OH)]∙ CH3OH, and molybdenum(V) complexes [MoOCl2(HL1)]∙ C2H5OH, as well as of the pyridoxal thiosemicarbazone ligand methanol solvate H2L3∙ MeOH, were determined by the single crystal X-ray diffraction method.

Molybdenum(VI) complexes ; molybdenum(V) complexes ; thiosemicarbazone ; pyridoxal ; crystal structure

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