title: 3-Benzyl-5-bromo-pyrazin-2(1H)-one.
abstract: In the title compound, C(11)H(9)BrN(2)O, the mol-ecules are linked into R(2) (2)(8) dimers by paired N-H⋯O hydrogen bonds and these dimers are further stacked into columns along the c axis by π-π inter-actions between pyrazinone rings [centroid-centroid distance = 3.544 Å; the dihedral angle between the planes of these rings is 7.51 (16)°]. The title compound is a precursor for agents with potential use as pharmaceuticals.
authors.forename: Jo
authors.initials: J
authors.lastname: Alen
authors.forename: Liliana
authors.initials: L
authors.lastname: Dobrzańska