Photoredox reactions of binuclear iron(II) and (III) disulfide complexes. Disulfide as CT acceptor and donor

Abstract

In analogy to peroxide, disulfide is an oxidant as well as a reductant. Accordingly, as a ligand of a reducing metal center, low-energy MLCT transitions can occur, while with oxidizing metals low-energy LMCT transitions should be observed. Such MLCT and LMCT excitations are expected to induce redox reactions. The complexes [CpFe(II)(CO)(2)](2)mu-S-2 (Cp=C5H5) and {[Fe(III)(CN)(5)](2)mu-S-2}(6-) are suitable examples to explore this behavior. (C) 2017 Elsevier B.V. All rights reserved.