Figure 5. Solid-state structure of the icosahedral cage 2.
(a) Wireframe representation showing a quasi-dodecahedron defined by the inner −yl uranyl oxygens with edges between 8.24 and 9.07 Å, and an inscribed sphere of ca. 12 Å radius (7238 Å3 volume), representative of the inner available space. (b) Position of the pyridinium counterions interacting with the oxygen of the uranyl and water molecule hydrogen bonded to an OH group of the lower rim. (c) View of the crystal packing. The cavity is likely filled with disordered pyridinium cations and solvent molecules.