Secondary dialkylammonium ions thread through the cavity of (RS)-benzo-2,2′-binaphtho[26]crown-8 to create [2]pseudorotaxanes, one of which was stoppered to produce a [2]rotaxane—incorporating the chiral binaphthyl unit—that was characterised by NMR spectroscopy, mass spectrometry and X-ray crystallography.
S. J. Cantrill, M. C. T. Fyfe, A. M. Heiss, J. Fraser Stoddart, A. J. P. White and D. J. Williams, Chem. Commun., 1999, 1251 DOI: 10.1039/A902096I
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