Date Published: July 01, 2012
Publisher: International Union of Crystallography
Author(s): Gong-Xiao Zhang, Ping Li, Jian Dong, Hong-Yu Chen.
In the title compound, C12H9N2+·Br−, the protonated tricyclic ring system is slightly twisted, with a dihedral angle of 3.9 (1)° between the two outer benzene rings. In the crystal, N—H⋯Br and C—H⋯Br hydrogen bonds link two cations and two bromide anions into centrosymmetric assemblies, which are further packed into stacks along  via π–π interactions between the aromatic rings [centroid–centroid distance = 3.725 (4) Å].
For applications of phenazines, see: Laursen & Nielsen (2004 ▶); Uchida & Kimura (1984 ▶). For related structures, see: Braga et al. (2010 ▶); Zhang et al. (2012 ▶).