The binaphthyl metallocleft 2 in which an electrophilic uranyl cation is immobilized was synthesized by reaction of 1,2‐benzenediamine and aldehyde 5. According to 1H‐NMR spectroscopy, 2 is formed as a mixture of meso and racemic diastereomers (ratio 1:0.85). The complexation of 2 with pyridine, (iso)quinoline, acridine, benzylamine, and 1‐naphthalenemethanamine was investigated. The association constants of the complexes with aromatic amines vary from 3.5 · 102 to 3.6 · 106 M−1 (meso‐2) and 1.5 · 102 to 1.0 · 106 M−1 (racemic‐2). The higher stability of the complexes with meso‐2 is in agreement with the results of molecular mechanics calculations.
van Doorn, A. R., Rushton, D. J., Verboom, W., Reinhoudt, D. N., & Bos, M. (1992). Molecular recognition of neutral molecules by rigid binaphthyl metalloclefts: synthesis complexation and calculations. Recueil des travaux chimiques des Pays-Bas, 111(10), 415-420. https://doi.org/10.1002/recl.19921111001