Abstract: Chemical and electrochemical reduction of dianthryl compounds affords mono-, di-, tri-, and tetraanions via successive electron-transfer processes. The diamagnetic or paramagnetic ions are characterized by NMR and ESR spectroscopy, respectively, by cyclic voltammetry, and by quenching reactions. The title dianthryl systems have in common that two anthracene units are linked by ethane bridges in a sterically variable fashion. It ...