article · IUCrData
The title compound, (C<sub>2</sub>H<sub>10</sub>N<sub>2</sub>)<sub>2</sub>[(C<sub>10</sub>H<sub>12</sub>N<sub>2</sub>O<sub>8</sub>)(MoO<sub>3</sub>)<sub>2</sub>]·4H<sub>2</sub>O, which crystallizes in the monoclinic <i>C</i>2/<i>c</i> space group, was obtained by mixing molybdenum oxide, ethyl-enedi-amine and ethyl-enedi-amine-tetra-acetic acid (H<sub>4</sub>edta) in a 2:4:1 ratio. The complex anion contains two MoO<sub>3</sub> units bridged by an edta<sup>4-</sup> anion. The midpoint of the central C-C bond of the edta<sup>4-</sup> anion is located on a crystallographic inversion centre. The independent Mo atom is tridentately coordin-ated by a nitro-gen atom and two carboxyl-ate groups of the edta<sup>4-</sup> ligand, together with the three oxo ligands, producing a distorted octa-hedral coordination environment. In the three-dimensional supra-molecular crystal structure, the dinuclear anions, the organo-ammonium counter-ions and the solvent water mol-ecules are linked by N-H⋯O<sub>w</sub>, N-H⋯O<sub>edta</sub> and O-H⋯O hydrogen bonds.
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DOI: 10.1107/s2414314624006679
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