Acta Cryst. (2008). E64, m375  [ doi:10.1107/S1600536808001323 ]

Poly[triaqua-₄-pyridine-3,5-dicarboxylato-barium(II)]

H. Aghabozorg, A. Nemati, Z. Derikvand, M. Ghadermazi and S. Daneshvar

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 Ba^II 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 Ba^II 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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