Acta Cryst. (2008). E64, m375 [ doi:10.1107/S1600536808001323 ]
Abstract: The reaction of the proton-transfer compound (pdaH2)(py-3,5-dc)·H2O (pda = propane-1,3-diamine and py-3,5-dcH2 = pyridine-3,5-dicarboxylic acid) with Ba(NO3)2 leads to the formation of the title polymeric compound, [Ba(C7H3NO4)(H2O)3]n. The BaII atom is nine-coordinated by six carboxylate O atoms from the (py-3,5-dc)2- ligands, and three O atoms from the coordinated water molecules. The coordination polyhedron around the BaII atom is best described as tricapped trigonal-prismatic. In the crystal structure, intermolecular interactions, such as X-HO hydrogen bonds (X = O and C) and - stacking [centroid-centroid distances between pyridine rings of 3.6191 (13) and 3.6192 (13) Å] play an important role in stabilizing the supramolecular structure.
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