Acta Cryst. (2009). E65, m1181-m1182  [ doi:10.1107/S1600536809032036 ]

catena-Poly[[diaqua(1,2,3-benzothiadiazole-7-carboxylato-O)copper(II)]--1,2,3-benzothiadiazole-7-carboxylato-²N²:O]

G.-Y. Zhang, X. Zhang and H.-Z. Xu

Abstract: In the polymeric title complex, [Cu(C₇H₃N₂O₂S)₂(H₂O)₂]_n, the Cu^II centre is surrounded by three 1,2,3-benzothiadiazole-7-carboxylate and two water molecules. A 1,2,3-benzothiadiazole-7-carboxylate ligand bridges two Cu^II centres, with a CuCu distance of 9.006 (2) Å. The four O atoms in the equatorial planes around each Cu^II centre form a distorted square-planar arrangement, while the distorted square-pyramidal coordination is completed by the symmetry-related N atoms of the bridging 1,2,3-benzothiadiazole-7-carboxylate ligands. In the crystal structure, intermolecular O-HO and O-HN hydrogen bonds link the molecules into a three-dimensional supramolecular network.

Online 9 September 2009

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