(IUCr) Crystallography Journals Online

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Acta Cryst. (2005). E61, m2488-m2490 [ doi:10.1107/S1600536805035464 ]

A two-dimensional brick-wall layer barium(II) coordination polymer: poly[[tetraaquabarium(II)-di--1H-imidazole-4,5-dicarboxylato] dihydrate]

X.-F. Zhang, S. Gao, L.-H. Huo and H. Zhao

Abstract: In the title two-dimensional coordination polymer, {[Ba(H₂IDC)₂(H₂O)₄]·2H₂O}_n (H₂IDC^- is the 1H-imidazole-4,5-dicarboxylate monoanion, C₅H₃N₂O₄^-), each Ba^II atom, which lies on a crystallographic twofold rotation axis, is ten-coordinated by four O atoms and two N atoms from different H₂IDC^- ligands, as well as four water molecules, thus defining a hexadecahedron. Four Ba^II atoms are linked by four different H₂IDC^- ligands to produce a centrosymmetric macrocyclic structure, leading to an extended two-dimensional brick-wall open framework. Furthermore, there are [pi] - [pi] stacking interactions between adjacent parallel imidazole rings in the layer structure, and a three-dimensional supramolecular network is constructed via hydrogen-bonding and [pi] - [pi] stacking interactions.

Online 5 November 2005