Internally 1,4‐Phenylene‐Bridged <i>meso</i> Aryl‐Substituted Expanded Porphyrins: The Decaphyrin and Octaphyrin Cases

Abstract

Current affairs: Incorporation of a 1,4-phenylene bridge into meso aryl-substituted decaphyrin and octaphyrin has a profound impact on the structural and electronic properties of the macrocycles. Bridged decaphyrin has two oxidation states, one of which shows a rather strong diatropic ring current. X-ray crystal structure analyses reveal bridged octaphyrin possesses a p-quinodimethane unit, while bridged decaphyrin has a phenylene unit (see picture).