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Acta Cryst. (2013). E69, m317-m318
[ doi:10.1107/S1600536813012269 ]

catena-Poly[[[diaquabis[1,2-bis(pyridin-4-yl)diazene]copper(II)]-[mu]-1,2-bis(pyridin-4-yl)diazene] bis(perchlorate)]

E. Ballestero-Martínez, C. S. Campos-Fernández, V. H. Soto-Tellini, S. Gonzalez-Montiel and D. Martínez-Otero

Abstract: In the title compound, {[Cu(C10H8N4)3(H2O)2](ClO4)2}n, the coordination environment of the cationic CuII atom is distorted octahedral, formed by pairs of symmetry-equivalent 1,2-bis(pyridin-4-yl)diazene ligands, bridging 1,2-bis(pyridin-4-yl)diazene ligands and two non-equivalent water molecules. The 1,2-bis(pyridin-4-yl)diazene molecules form polymeric chains parallel to [-101] via azo bonds which are situated about inversion centres. Since the CuII atom is situated on a twofold rotation axis, the monomeric unit has point symmetry 2. The perchlorate anions are disordered in a 0.536 (9):0.464 (9) ratio and are acceptors of water H atoms in medium-strong O-H...O hydrogen bonds with graph set R44(12). The water molecules, which are coordinated to the CuII atom and are hydrogen-bonded to the perchlorate anions, form columns parallel to [010]. A [pi]-[pi] interaction [centroid-centroid distance = 3.913 (2) Å] occurs between pyridine rings, and weak C-H...O interactions also occur.

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