Received 29 October 2013
In the monomeric title complex, [Cd(C2O4)(CH3N5)2(H2O)2], the CdII ion exhibits a distorted octahedral coordination geometry, with the equatorial plane defined by two O atoms from an oxalate ligand and two N atoms from two 5-amino-1H-tetrazole ligands; the axial sites are occupied by two water molecules, with longer Cd-O bond lengths. An intramolecular N-HO hydrogen bond occurs. In the crystal, N-HO as well as O-HO and O-HN hydrogen bonds (some of which are bifurcated) link the complex molecules into a three-dimensional network.
For background to five-membered heterocycle ligands in compounds with metal-organic framework structures, see: Wang et al. (2010); Yu et al. (2010); He et al. (2006); Wei et al. (2010). For related complexes with mixed ligands, see: Zhai et al. (2007); García-Couceiro et al. (2005); Prasad et al. (2002).
Data collection: CrystalClear (Rigaku, 2002); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BH2488 ).
The authors are grateful for financial support from the Natural Science Fund for Young Scholars of Fujian Province (grant No. 2011 J05018).
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