Abstract
AbstractA highly oxidized cobalt porphyrin dimer is reported. Each cobalt(II) ion and porphyrin ring underwent 1e oxidation with iodine as the oxidant to give a 4e‐oxidized cobalt(III) porphyrin π‐cation radical dimer. The bridging ethylene group allows for substantial conjugation of the porphyrin macrocycles, thus leading to a strong antiferromagnetic coupling between the π‐cation radicals and to stabilization of the singlet state. X‐ray crystallography clearly showed that the complex may be considered as a real supramolecule rather than two cobalt(III) porphyrin π‐cation radicals that interact through space.
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