New Supramolecular Complex of C₆₀ Based on Calix[5]arene—Its Structure in the Crystal and in Solution

Usually the host, C60 is here the guest in a complex between C60 and calix[5]arenes (see picture) that was studied both in solution and in the solid state. In solution, as disclosed by the ring current method of analysis for 13C NMR spectra based on the X-ray crystallographic analysis, van der Waals interactions between the host and guest play an important role in the complexation.