Fivefold coordination of a Cu < sup > II < /sup > -aqua ion: A supramolecular sandwich consisting of two crown ether molecules and a trigonal-bipyramidal [Cu(H < inf > 2 < /inf > O) < inf > 5 < /inf > ] < sup > 2+ < /sup > complex

Abstract

(Figure Presented) Copper crowned: A trigonal-bipyramidal [Cu(H2O)5]2+ion, which is inserted between two crown ether molecules ([18]crown-6) to form a unique supramolecular sandwich, [Cu(H2O)5-([18]crown-6)2]2+(see picture), has been characterized unambiguously by single-crystal X-ray diffraction, Isopolyanions, [Mo6O19]2-, facilitate the formation of this new structure. © 2006 Wiley-VCH Verlag GmbH & Co. KGaA.