Received 28 September 2013
In the polymeric title compound, [Ba(NO3)2(C6H9N3O2)2]n, the BaII atom is located on a crystallographic twofold axis and is coordinated by ten O atoms. Six are derived from two zwitterionic L-histidine molecules that simultaneously chelate one BaII atom and bridge to another. The remaining four O atoms are derived from two chelating nitrates. The molecules assemble to form a chain along . In the crystal, chains are linked via N-HO and N-HN hydrogen bonds, generating a three-dimensional network.
For the biological activity of histidine, see: Eichler et al. (2005); Wimalasena et al. (2007). For standard bond lengths, see: Allen et al. (1987). For related structures, see: Andra et al. (2010); Gokul Raj et al. (2006).
Data collection: APEX2 (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: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: TK5259 ).
The authors wish to acknowledge the SAIF, IIT Madras, for the data collection.
Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (1987). J. Chem. Soc. Perkin Trans. 2, pp. S1-19.
Andra, K. K., Bullinger, J. C., Bann, J. G. & Eichhorn, D. M. (2010). Acta Cryst. E66, o2713.
Bruker (2004). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.
Eichler, J. F., Cramer, J. C., Kirk, K. L. & Bann, J. G. (2005). ChemBioChem, 6, 2170-2173.
Flack, H. D. (1983). Acta Cryst. A39, 876-881.
Gokul Raj, S., Ramesh Kumar, G., Raghavalu, T., Mohan, R. & Jayavel, R. (2006). Acta Cryst. E62, o1178-o1180.
Sheldrick, G. M. (1996). SADABS, University of Göttingen, Germany.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Spek, A. L. (2009). Acta Cryst. D65, 148-155.
Wimalasena, D. S., Cramer, J. C., Janowiak, B. E., Juris, S. J., Melnyk, R. A., Anderson, D. E., Kirk, K. L., Collier, R. J. & Bann, J. G. (2007). Biochemistry, 46, 14928-14936.