Abstract
Tetradonor-substituted 2,5-diazapentalenes like 1 have been synthesized for the first time via a simple route. These crystalline, colored compounds exhibit high basicity; they can be oxidized to the radical cations and to the dications and reduced to the radical anions and to the dianions (multistep reversible redox systems). The double bonds in the tetraaminodiazapentalenes are delocalized, even though the systems contain eight π electrons.
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