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Binaphthol aldehydes with appended dipicolylamine moieties, (R)‐1, and (R)‐2, were synthesized. The reaction of (R)‐1 with an amino acid together with the ZnII ion produces a monomeric complex that discriminates the chirality of the bound amino acid by 1H NMR spectroscopy. The same reaction of (R)‐2, which is different from (R)‐1 by only one nitrogen atom, generates a dimeric complex that is highly...