N-(4-Bromo­phen­yl)pyrazine-2-carbox­amide

---

Abstract

The mol­ecule of the title compound, C₁₁H₈BrN₃O, is close to planar (r.m.s. deviation of all 16 non-H atoms = 0.103 Å), a conformation stabilized by an intra­molecular N-HN hydrogen bond, which generates an S(5) ring. In the crystal structure, supra­molecular chains mediated by C-HO contacts (along a) are linked into a double layer via NBr halogen bonds [3.207 (5) Å] and C-Br inter­actions [Brring centroid(pyrazine) = 3.446 (3) Å]. The layers stack along the b axis via weak – inter­actions [ring centroid(pyrazine)ring centroid(benzene) distance = 3.803 (4) Å].

---

Keywords: None Document Type: Research Article DOI: http://dx.doi.org/10.1107/S1600536810039036 Publication date: 1 de Janeiro de 2010