Stable Ni^II Porphyrin <i>meso</i>‐Oxy Radical with a Quartet Ground State

Abstract

Abstract 10,15,20‐Tris(pentafluorophenyl)‐substituted Ni II –porphyrin meso ‐oxy radical bearing two coordinating pyridines was synthesized as a stable radical with a quartet ground state ( S= 3/2). X‐ray structural analysis revealed that the Ni II porphyrin moiety is fairly planar and the Ni−N bond lengths are considerably longer, indicating the high‐spin state of the Ni II center. The radical exhibited a quartet ground state, indicating the ferromagnetic interaction between the high‐spin Ni II center ( S= 1) and the porphyrin meso ‐oxy radical ( S= 1/2).