Axial ligation modulates the electron distribution in helical cobalt complexes derived from octaethylbilindione

Abstract

Addition of pyridine to the four-coordinate cobalt(II) complex, [Co ^II (oebOx)]I ₃ , which shows an EPR spectrum with well resolved Co hyperfine coupling, converts the complex into one with Co ^III /ligand radical structure and an EPR spectrum with g _z = 1.98, and g _xy = 2.02 and no cobalt hyperfine coupling.