Phenazine-2,3-diamine.

The planar electron-rich heterocyclic diamine 2,3-diaminophenazine (DAP), C12H10N4, is of particular interest to both chemists and biochemists because of its rich organic chemistry and intense luminescence. In this paper, we report the first structure of DAP in its non-protonated form and describe the intriguing crystal packing, which features pi-pi, hydrogen- and T-bonded interactions.