Syntheses, characterization, and structures of vanadium(V) complexes with similar tridentate hydrazone and bidentate benzohydroxamate ligands

New vanadium(V) complexes, [VO(L1)(Bzh)] and [VO(L2)(Bzh)] · CH3OH, were prepared by the reaction of [VO(Acac)2] (Acac = acetylacetonate) and benzohydroxamic acid (HBzh) with N′-(3-bromo-2-hydroxybenzylidene)-2-chlorobenzohydrazide (H2L1) and 2-chloro-N′-(2-hydroxy-5-methoxybenzylidene)benzohydrazide (H2L2), respectively, in methanol. Molecular component and structures of the complexes were determined by elemental analysis, infrared and UV-Vis spectra. Single crystal structures of the complexes were determined by X-ray diffraction (CIF file CCDC nos. 1006633 (I) and 1006634 (II)). The V atoms are in octahedral coordination. Thermal stability of the complexes was studied.