“Triggering redox activity in a thiophene compound: radical stabilization and coordination chemistry”
M. Curcio, J. R. Pankhurst, S. Sproules, D. Mignard, J. B. Love, Angew. Chem. Int. Ed., 2017, DOI: 10.1002/anie.201703576R1
Abstract: The synthesis, metalation, and redox properties of an acyclic bis(iminothienyl)methene L− are presented. This π-conjugated anion displays pronounced redox activity, undergoing facile one-electron oxidation to the acyclic, metal-free, neutral radical L• on reaction with FeBr2. In contrast, reaction of L− with CuI forms the unique, neutral Cu2I2(L•) complex of a ligand-centered radical, whereas reaction with the stronger oxidant AgBF4 forms the metal-free radical dication L•2+.