Acta Cryst. (2006). E62, o3620-o3622  [ doi:10.1107/S1600536806029011 ]

Piperazinium bis(6-carboxypyridine-2-carboxylate) trihydrate

S. Sheshmani, M. Ghadermazi and H. Aghabozorg

Abstract: The title compound, C₁₈H₂₆N₄O₁₁, is a proton-transfer compound obtained from pyridine-2,6-dicarboxylic acid and piperazine. The asymmetric unit contains one half-cation, one anion and 1.5 water molecules. There is a centre of inversion at the centre of the cation ring and one water molecule lies on a twofold rotation axis. In the crystal structure, intermolecular O-HO, N-HO and N-HN hydrogen bonds play an important role in the construction of the three-dimensional framework.

Online 2 August 2006

Copyright © International Union of Crystallography
IUCr Webmaster