Some examples of inorganic supermolecules

2 nm with a small and unoccupied hole in the middle (Fig. 20.3.2). Each pair of iron(III) centers are bridged by two methoxides and one O, O -chloroacetate group. 

A hemicarceplex consisting of a hemicarcerand host molecule enclosing a ferrocene guest molecule. 

In a helicate the polytopic ligand winds around a linear array of metal ions lying on the helical axis, so that its ligation sites match the coordination requirements 

Synthetic scheme for dicopper and free trefoil knots. From C. O. Dietrich-Buchecker, J. Guilhem, C. Pascard and J.-P. Sauvage, Angew. Chem. Int. Ed. 29, 1154-6 (1990). 

Template synthesis of a free trefoil knot and an unknotted product. 

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