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Host–guest interactions between tiara[5]arene and cationic species. a) Partial 1H NMR spectra (400 MHz, MeOD‐d 4, 298 K) of T[5], chloride salts of methylpyridinium and methyl viologen, and their 1:1 mixtures at 5 mm concentrations. b),c) The association constants of b) [Py⊂T[5]]⋅Cl and c) [MV⊂T[5]]⋅2Cl 1:1 complexes in MeOD‐d 4 are determined by NMR titration method.
