New podands capable of intramolecular hydrogen bonding (1–3) have been synthesized. 13C NMR titration experiments and FAB mass spectra of the podands show that 1 and 2 form pseudo-cyclic structures under guest-free conditions. The X-ray crystal structure of the 2–NaSCN complex is also reported.
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Habata et al. (2002) studied this question.
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