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In the anion of the title compound, (C2H10N2)[VO(H2O)(C3H2O4)(2)] or H(2)en[VO(mal)(2)H2O], vanadium(IV) is distorted-octahedrally coordinated by six donor O atoms. The two malonate ligands are situated in the equatorial plane, whereas the oxo and the water ligand occupy axial positions. The apical V=O bond exhibits a strong trans influence. The anion possesses crystallographically imposed C-2 symmetry, with the central V atom, the oxo and the water ligand lying on the twofold axis.
Source:Acta Crystallographica. Section E: Structure Reports Online, 2003, 59, 7
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