A Highly Oxidized Cobalt Porphyrin Dimer: Spin Coupling and Stabilization of the Four‐Electron Oxidation Product

Abstract

Thee thene-bridged cobalt(II) porphyrin dimers trans-1 and cis-1 (Scheme 1) were synthesized in excellent yield by heating the corresponding free ligand with Co(OAc) 2 (added as as olution in methanol) in CH 2 Cl 2 at reflux under N 2 .T he dissolution of trans-1 into THF resulted in the formation of the five-coordinate complex trans-2·THF,w hich was isolated Scheme 1. Synthesis of the complexes.