N-(2-Chloro-eth-yl)pyrazine-2-carboxamide.

In the title mol-ecule, C(7)H(8)ClN(3)O, the pyrazine and amide groups are almost co-planar [N-C-C-N torsion angle = -2.4 (2) °], a conformation stabilized by an intra-molecular N-H⋯N hydrogen bond. The chloro-ethyl group lies out of the plane [N-C-C-Cl = -65.06 (17) °]. In the crystal, the presence of N-H⋯N hydrogen bonds leads to the formation of a C(6) supra-molecular chain along the b axis. The carbonyl-O atom accepts two C-H⋯O inter-actions. These, plus Cl⋯Cl short contacts [3.3653 (6) Å], consolidate the packing of the chains in the crystal.