Research Article: Diaqua­bis­(5-carb­oxy-1H-imidazole-4-carboxyl­ato-κ2N3,O4)iron(II)

Date Published: July 01, 2011

Publisher: International Union of Crystallography

Author(s): Chao-Jun Du, Xing-Hua Song, Li-Sheng Wang, Chao-Ling Du.


In the title compound, [Fe(C5H3N2O4)2(H2O)2], the FeII ion lies on an inversion centre and is coordinated by two N and two O atoms from two 5-carb­oxy-1H-imidazole-4-carboxyl­ate ligands and two water mol­ecules in a distorted octa­hedral geometry. An intra­molecular O—H⋯O hydrogen bond occurs. In the crystal, inter­molecular N—H⋯O and O—H⋯O hydrogen bonds form a three-dimensional network, which consolidates the packing.

Partial Text

For the diversity of coordination architectures of the metal atom in complexes with 4,5-dicarb­oxy­imidazole, see: Shimizu et al. (2004 ▶); Fang & Zhang (2006 ▶). For the closely related crystal structures of the Zn, Mg and Cd complexes, see: Ma et al. (2003 ▶), Liu et al. (2004 ▶) and Zhang et al. (2004 ▶), respectively.




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