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Metallomacrocyclic arrays containing eight copper(II) centers (see picture; green Cu, blue N, red O, yellow S) were obtained by using a heptadentate thiocarbohydrazone ligand with a particular conformational and configurational flexibility, as well as an appropriate arrangement of metal-binding sites, coordination ability, and acid–base properties.
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Dragancea et al. (2005) studied this question.
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