Acta Cryst. (2003). E59, m800-m802  [ doi:10.1107/S160053680301732X ]

Dipotassium aquabis(pyrazine-2,3-dicarboxylato-²N,O)cuprate(II) hexahydrate

O. Castillo, G. Beobide, A. Luque and P. Román

Abstract: The crystal structure of the title compound, K₂[Cu(C₆H₂N₂O₄)₂(H₂O)]·6H₂O, consists of mononuclear [Cu(pzdc)₂(H₂O)]^2- complex anions (pzdc is pyrazine-2,3-dicarboxylate), K⁺ cations and water molecules, held together by means of K-O/OW bonds and an extended OW-HO/OW and OW-HN hydrogen-bond network. The distorted square-pyramidal coordination of the Cu atom is achieved by two N and two O donor atoms from two bidentate pzdc ligands in the basal plane, while a water molecule occupies the apical position with a longer metal-O distance.

Online 30 August 2003

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