Fig. 4: Structural variation of {V30} capsules.

A Structure of M-{V30}4o/2c, M = K, Rb; B Structure of M-{V30}2o/4c M = Na,# K, Rb; C Structure of Cs-{V30}3o/3c; Structures are shown from different perspectives, respectively. Colour code: VV light green; VIV green; Rb orange; Cs blue; Na yellow; P pink; O red; C grey; cation-π interactions between phenyl moieties and alkali ions are shown as intersected bonds; phenyl H-atoms and Cs-O bonds removed for clarity. #Note: In the Na-{V30} structure the inversion/flipping of the V=O moieties in the {V5O9}o units only occurs at very low propensity.