Acta Cryst. (2005). E61, m2080-m2082  [ doi:10.1107/S160053680503000X ]

catena-Poly[[hexakis(1H-benzimidazole)bis(²-5-sulfonatosalicylato)tricopper(II)] octahydrate]

S.-R. Fan and L.-G. Zhu

Abstract: The crystal structure of the title compound, {[Cu₃(C₇H₃O₆S)₂(C₇H₆N₂)₆]·8H₂O}_n, is built of trinuclear complexes [Cu₃(bz)₆(ssal)₂] (bz = benzimidazole and ssal = 5-sulfonatosalicylate trianion) and uncoordinated water molecules. The molecule of the complex occupies a special position on a crystallographic inversion centre. The Cu atom located on the inversion centre has a square planar coordination made up of the two N atoms of monodentate benzimidazole ligands and the O atoms of two bridging salicylates. The other crystallographically independent Cu atom has a square pyramidal environment formed by the N atoms of two more monodentate benzimidazole ligands, two chelate O atoms of the bridging salicylate and the sulfonate O atom of the sulfonatosalicylate ligand belonging to the neighbouring trimetallic complex. The latter coordination links the molecules of the complex into infinite chains running along the a axis. These chains are further connected by O-HO and N-HO hydrogen bonding into a three-dimensional network.

Online 24 September 2005

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