Acta Cryst. (2006). E62, m804-m806  [ doi:10.1107/S1600536806008427 ]

A sandwich strand supramolecular complex: aquachloro(nitrilotriacetato-²N,O)copper(II) 18-crown-6-ether trihydrate

Y.-B. Jiang, H.-Z. Kou, R.-J. Wang and A.-L. Cui

Abstract: The unexpected title compound, [Cu(C₆H₈NO₆)Cl(H₂O)]·C₁₂H₂₄O₆·3H₂O, was synthesized by crystallization of a mixture containing CuCl₂·2H₂O, nitrilotriacetic acid (H₃NTA), KOH, 18-crown-6 and GdCl₃·6H₂O. The complex consists of a hydrogen-bonded polymeric structure, in which discrete Cu(H₂NTA)(H₂O)Cl units interact via the carboxyl groups and the coordinating water molecules with the crown ether molecules. No direct metal-crown ether bond exists in the infinite sandwich-type hydrogen-bonded structure. The copper complex lies on a mirror plane, which passes through Cu and all the coordinating atoms. The crown ether molecule lies on an inversion centre. One water molecule is disordered across the mirror plane.

Online 17 March 2006

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