Mineralomimetic host-guest chemistry: the encapsulation of [M+ [2.2.2]cryptate] (M = Na, K) by saddle shaped Ni(II) macrocycles

The complex [M⊂[2.2.2]cryptate][CB11H12][Ni(TMTAA)]3, M = K, Na shows a range of supramolecular interactions to form a mineralomimetic structure corresponding to that of perovskite.