Ion-Pairing Assemblies of Oxacorrole AgIII Complex.

In this study, ion pairs of 10-oxacorrole AgIII complex as an aromatic [17]oxaannulene were synthesized, leveraging its small inner cavity. The cation formed solid-state ion-pairing assemblies whose packing structures were governed by the stacking of π-planes along with dipole-dipole, hydrogen-bonding, and C-H···π interactions, depending on the counteranions. The 10-oxacorrole AgIII complex deviated from planarity due to the insertion of a relatively large AgIII into the confined cavity. Theoretical studies of packing structures have revealed that ion-pairing assemblies can be constructed by combining electrostatic and dispersion forces controlled by the location and spatial arrangement of the constituent charged species.