Redox properties of zinc complexes of verdazyl radicals and diradicals

► Zinc complexes of tridentate verdazyl radical and diradical were prepared. ► The coordinated radicals can be oxidized and reduced reversibly. ► Redox potentials of the zinc coordinated verdazyls differ strongly from the free ligands. ► Oxidation of the zinc diradical leads to redox-induced hemilabile behavior.