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Synthesis and Crystal Structures of Ethanol-Coordinated Molybdenum(VI) Oxo Complexes with Tridentate Hydrazone Ligands

Shao-Song Qian, Xiao-Shan Cheng, Zhong-Lu You, Hai-Liang Zhu


Reaction of [MoO2(acac)2] (where acac = acetylacetonate) with two similar hydrazone ligands in ethanol yielded two ethanol-coordinated mononuclear molybdenum(VI) oxo complexes with general formula [MoO2L(EtOH)], where L = L1 = (N’-(3,5-dibromo-2-hydroxybenzylidene)-4-nitrobenzohydrazide (H2L1), and L = L2 = (N’-(3,5-dibromo-2- hydroxybenzylidene)-2-fluorobenzohydrazide (H2L2). Crystal and molecular structures of the complexes were determined by single crystal X-ray diffraction method. All of the investigated compounds were further characterized by elemental analysis and FT-IR spectra. Single crystal X-ray structural studies indicate that the hydrazone ligands coordinate to the MoO2 cores through enolate oxygen, phenolate oxygen and azomethine nitrogen. The Mo atoms in both complexes are in octahedral coordination. Thermal stability of the complexes has also been studied.


Molybdenum complex; Hydrazone ligand; Crystal structure; X-ray diffraction; Thermal property.

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