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Upfield region of the 1H-NMR spectra (600 MHz, mesitylene-d12) of p-cymene encapsulated in 1.24.1 at various temperatures. The broadening at higher temperatures is caused by interconversion of the two enantiomeric arrays of the glycoluril spacers in the capsules; the social isomers do not interconvert on the NMR time scale.
