Received 18 October 2013
The complete binuclear complex in [Fe2(C7H4NO4)4(OH)2]·2H2O, is generated by the application twofold symmetry. The FeIII atom is coordinated by the O atoms of two bridging hydroxyl groups and by two N and two O atoms from two pyridine-2,5-dicarboxylato ligands, forming a distorted octahedral geometry. The FeFe separation within the dinuclear complex is 3.0657 (4) Å. In the crystal, O-HO and C-HO hydrogen-bonding interactions connect the molecules into a three-dimensional supramolecular network.
For background to the coordination modes of the pyridine-2,5-dicarboxylate ligand, see: Zhang et al. (2005, 2006); Liang et al. (2000); Wibowo et al. (2011). For iron complexes of the pyridine-2,5-dicarboxylate ligand, see: Shi et al. (2011); Xu et al. (2004); Gao et al. (2005).
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: RZ5089 ).
This work was supported financially by the HuangHe Hydropower Development Co. Ltd, Qinghai.
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