(A) Crystal structure of the complex [(NO3)3]3− ⊂ [H877]8+.
(B) Crystal structure of the complex [(NO3)2]2− ⊂ [H478]4+.
(C) Crystal structure of the complex [(HSO4)2]2− ⊂ [H578]5+.
(D) Crystal structure of the complex [Cl2(H2O)]2− ⊂ [H279]2+.
All anions encapsulated within the cavities are shown in space-filling form. Color code: C = grey, O = red, N = blue, S = yellow, and Cl = green. The counter anions and solvent molecules outside the cavities are omitted for clarity.