Acta Cryst. (2013). E69, o891 [ doi:10.1107/S1600536813012531 ]
Abstract: In the title compound, C12H10BrN3O, the dihedral angle between the mean planes of the 4-bromophenyl and pyrazin-2-yl rings is 54.6 (3)°. An intramolecular C-HO hydrogen bond generates an S(6) graph-set motif. In the crystal, weak N-HN hydrogen bonds link the molecules into chains along . The chains are linked via C-HN and C-HO hydrogen bonds, forming two-dimensional networks lying parallel to the ab plane.
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