Crystal structure of 2-amino-1,3-di­bromo-6-oxo-5,6-di­hydro­pyrido[1,2-a]quinoxalin-11-ium bromide monohydrate

In the title hydrated salt, C(12)H(8)Br(2)N(3)O(+)·Br(−)·H(2)O, which was synthesized by the reaction of the pyridine derivative Schiff base N (1),N (4)-bis­(pyridine-2-yl­methyl­ene)benzene-1,4-di­amine with bromine, the asymmetric unit contains a 2-amino-1,3-di­bromo-6-oxo-5,6-di­hydro­pyrido[1,2-a]quinoxalin-11-ium cation, with a protonated pyridine moiety, a bromide anion and a water mol­ecule of solvation. The cation is non-planar with the di­bromo-substituted benzene ring, forming dihedral angles of 24.3 (4) and 11.5 (4)° with the fused pyridine and pyrazine ring moieties, respectively. In the crystal, the cations are linked through a centrosymmetric hydrogen-bonded cyclic R (4) (2)(8) Br(2)(H(2)O)(2) unit by N—H⋯Br, N—H⋯O and O—H⋯Br hydrogen bonds, forming one-dimensional ribbons extending along b, with the planes of the cations lying parallel to (100).