Three‐Dimensional Intramolecular Exchange Interaction in a Curved and Nonalternant π‐Conjugated System: Corannulene with Two Phenoxyl Radicals

Abstract

A neutral diradical based on corannulene with curved and nonalternant π conjugation has been synthesized and isolated as air-stable crystals. Sizable spin delocalization and strong intramolecular exchange interaction in the intrinsically three-dimensional π network (see picture), as well as significant diradical contributions in the ground state, were experimentally disclosed.