Multielectron oxidation in a ferromagnetically coupled dinickel(ii) triple mesocate

Abstract

Triple-stranded dinuclear nickel(II) complexes of the meso-helicate type have been obtained from the new N,N′-1,3-phenylenebis(pyrazine-2-carboxamidate) ligand; they possess a multielectron redox behaviour featuring up to four stepwise, one-electron oxidation reactions of the two ferromagnetically coupled Ni^II ions to afford the putative high-valent dinickel(III) and dinickel(IV) species, as supported by theoretical calculations.