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The reaction of the proton-transfer compound (pdaH2)(py-3,5-dc)&#183;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&#8722; 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&#8212;H...O hydrogen bonds (X&#160;= O and C) and &#960;&#8211;&#960; stacking [centroid&#8211;centroid distances between pyridine rings of 3.6191&#8197;(13) and 3.6192&#8197;(13)&#8197;&#197;] play an important role in stabilizing the supramolecular structure

Poly[triaqua-μ4-pyridine-3,5-dicarboxylato-barium(II)]

Poly[triaqua-μ₄-pyridine-3,5-dicarboxylato-barium(II)]