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J. Chem. Soc., Chem. Commun., 1981, 849 - 850, DOI: 10.1039/C39810000849
Isolation and X-ray crystal structure of [Cu(NH3)4H2O.18-crown-6]n2+[PF6]2n– a linear face-to-face hydrogen bonded chain copolymer
Howard M. Colquhoun, J. Fraser Stoddart and David J. Williams
X-Ray crystallography reveals that the [aquo-(tetra-ammine)copper]2+ ion forms a chain copolymer with 18-crown-6 in which each individual crown molecule is involved in no fewer than ten hydrogen bonds with four ammine ligands co-ordinated to the copper(II) centres in adjacent ions.
