Supramolecular Click Chemistry with a Bisammonium‐C60 Substrate and a Ditopic Crown Ether Host

All clicking into place: Self-complementarity between a bis(crown ether) derivative and a bisammonium fullerene leads to the formation of a stable noncovalent macrocyclic 1:1 complex (see schematic representation). The binding constant for this complex is three orders of magnitude larger than that for other closely related systems as a result of the two-center host–guest topography.