Two for the price of one: A CuI-based [2]pseudorotaxane ([2]PR+) shows a complete switch in its architectural identity when it transforms into a “grid corner” (G−) and back again upon two-electron reduction (see picture; ReB: neutral (red) or reduced ligand (blue); Re: green; Cu: orange; MC: macrocycle).
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Parimal et al. (2010) studied this question.
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