(Ethanolato-κO)[N′-(3-methoxy-2-oxidobenzylidene-κO 2)benzohydrazidato-κ2 N′,O]oxidovanadium(V)

In the title complex, [V(C15H12N2O4)(C2H5O)O], the VV ion is coordinated by an oxide O atom, an ethanolate anion and two O atoms and one N atom from the tridentate benzohydrazidate dianion in a distorted square-pyramidal geometry; the V atom is displaced by 0.4748 (8) Å from the basal plane towards the axial oxide O atom. An intramolecular O—H⋯N hydrogen bond occurs in the benzohydrazidate ligand. Weak intermolecular C—H⋯O hydrogen bonding is present in the crystal.

In the title complex, [V(C 15 H 12 N 2 O 4 )(C 2 H 5 O)O], the V V ion is coordinated by an oxide O atom, an ethanolate anion and two O atoms and one N atom from the tridentate benzohydrazidate dianion in a distorted square-pyramidal geometry; the V atom is displaced by 0.4748 (8) Å from the basal plane towards the axial oxide O atom. An intramolecular O-HÁ Á ÁN hydrogen bond occurs in the benzohydrazidate ligand. Weak intermolecular C-HÁ Á ÁO hydrogen bonding is present in the crystal.

Experimental
Crystal data [V(C 15    In the recent years, the coordination chemistry and biochemisty of vanadium has received considerable attention (Deng et al., 2007;Monfared et al., 2011;Sutradhar et al., 2006). Generally, a tridentate hydrazone ligand is coordinated to the vanadium through O and N atoms, similar to those of the biological system. So, it is important to intensively study the relation ship of the syntheses and structural properties of vanadium hydrazone complexes.
In the title complex, [VO(C 15 H 12 N 2 O 4 )(C 2 H 5 O)], the V V ion exists in a distorted square-pyramidal coordination geometry. Three donor atoms (O1, O3 and N1) of the hydrozone ligand and O6 atom from the ethanol group define the coordination basal plane, with a maximum mean plane deviation of 0.030 (1) Å. The V atom is displaced towards the axial oxo O atom by 0.4748 (8) Å from the basal plane. Bond distances (Table 1) and bond angles around V1 atom are compared with those in reported oxovanadium complexes (Chen et al., 2004;Seena et al., 2008;Liu et al.,2006;Ghosh et al., 2007). In the crystal structure there are the intramolecular O-H···N hydrogen bonding and intermolecular C-H···O hydrogen bonding (Table 2).

Experimental
VO(acac) 2 (acac = acetylacetonate) was synthesized according to the reported method of Gao et al. (1998). The synthesis of the hydrazone ligand has already been reported in the literature (Huang et al., 2010).
The title compound was prepared by reacting H 2 L (0.1 mmol) with VO(acac) 2 (0.1 mmol) in ethanol solvent with stirring. The solution was filtered and allowed to stand at room temperature for one week, and dark-red crystals of complex (I) were obtained.

(Ethanolato-κO)[N′-(3-methoxy-2-oxidobenzylidene-κO 2 )benzohydrazidato-κ 2 N′,O]oxidovanadium(V)
Crystal data where P = (F o 2 + 2F c 2 )/3 (Δ/σ) max = 0.001 Δρ max = 0.34 e Å −3 Δρ min = −0.22 e Å −3 Special details Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > σ(F 2 ) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.