Allen, Kirsty E., Faulkner, Robert A., Harding, Lindsay P., Rice, Craig R., Riis-Johannessen, Thomas, Voss, Melanie L. and Whitehead, Martina (2010) Head-To-Tail and Heteroleptic Pentanuclear Circular Helicates. Angewandte Chemie International Edition, 49 (37). pp. 6655-6658. ISSN 1433-7851

Everybody form a circle: Careful design of ligand strands and their reaction with Cu2+ ions leads to the formation of the title helicates. Incorporation of differing numbers of N-donor units within a ligand strand containing a phenyl spacer results in a pentanuclear head-to-tail circular helicate, whereas reaction of two different ligands results in a heteroleptic pentanuclear circular helicate (see picture; green: Cu, red and blue: ligands).

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