Received 5 October 2012
The title compound, (C5H6N)[Cr(C2O4)2(H2O)2], contains one protonated pyridine molecule and one [Cr(C2O4)2(H2O)2]- complex anion in the asymmetric unit. The CrIII in the complex anion is coordinated in a distorted octahedral environment by two O atoms from two cis water molecules and four O atoms from two chelating oxalate dianions. The crystal packing is stabilized by intermolecular N-HO(oxalate) and O-HO(oxalate) hydrogen bonds and by - stacking interactions (centroid-centroid distance = 3.602 Å) between pyridine rings, thereby building up a three-dimensional network.
For the structural characterization of organic-inorganic salts containing the [Cr(C2O4)2(H2O)2]- anion, see: Bélombé et al. (2009); Nenwa et al. (2010, 2012); Chérif et al. (2011); Chérif, Abdelhak et al. (2012); Chérif, Zid et al. (2012).
Data collection: SMART (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2010); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: LR2086 ).
The authors thank Prof. Barthelemy Nyasse (Organic Chemistry Department, University of Yaounde I) for the donation of pyridine and Tobias Storp (RWTH Aachen) for his technical support during X-ray experiments.
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