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Two rings with preferred orientation as chain members which can interlock in two ways—that is the synthetic principle of topologically chiral [2]catenands 1. It has now been possible to prepare such a compound with 2 as the two individual rings by template synthesis via the copper(I) complex. The chirality of the complex is confirmed by the 1H-NMR spectrum in the presence of Pirkles reagent.
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Mitchell et al. (1988) studied this question.
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