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Acta Cryst. (2012). E68, m75 [ doi:10.1107/S1600536811054031 ]
![[mu]](/logos/entities/mu_rmgif.gif)
-3-carboxypyrazine-2-carboxylato-![[kappa]](/logos/entities/kappa_rmgif.gif)
4N1,O2;N4,O3] nitrate]Abstract: The crystal structure of the title compound, {[Zn(C6H3N2O4)(H2O)2]NO3}n, is built of zigzag cationic chains propagating in [010] with nitrate anions located in the space between the chains. The ZnII ion is coordinated by N and O atoms of two symmetry-related ligands in equatorial sites, and by two water O atoms at the axial sites of a distorted octahedron. One carboxylate group of the ligand remains protonated, serving as a donor in a short intramolecular O-H
O hydrogen bond. The coordinated water molecules are donors and the nitrate O atoms act as acceptors in a network of O-HO hydrogen bonds.
Online 21 December 2011
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