(A) Molecular structures of receptors 82 and 83.
(B) The crystal structure of the complex [(NO3)2]2− ⊂ [H282]2+.
(C) The crystal structure of the complex [(Cl2]2− ⊂ [H883]8+.
All anions encapsulated within the cavity are shown in space-filling form. Color code: C = grey, O = red, N = blue and Cl = green. The counter anions and solvent molecules outside the cavities are omitted for clarity.