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Acta Cryst. (2013). E69, o1141  [ doi:10.1107/S1600536813016917 ]


S. Hameed, M. Ahmad, M. N. Tahir, M. A. Shah and H. A. Shad

Abstract: In the title compound, C12H9BrN4O, the N'-methylidenepyrazine-2-carbohydrazide and 4-bromobenzene groups are oriented at a dihedral angle of 10.57 (7)°. The hydrazide N-H group is involved in intramolecular N-H...N interaction, which generates an S(5) motif. A short C-H...O interaction is formed between the methylidene H atom and the carbonyl O atom. It connects molecules into chains extending along [100]. In addition, molecules are arranged into stacks extending along [010] via [pi]-[pi] interactions between pyrazine and benzene rings, with centroid-centroid distances of 3.837 (2) and 3.860 (2) Å.

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