Key indicators: single-crystal X-ray study; T = 173 K; mean (C-C) = 0.002 Å; R factor = 0.040; wR factor = 0.113; data-to-parameter ratio = 14.8.In the title compound, C 6 H 7 N 3 O, the amide group is rotated such that the carbonyl O atom is syn to the pyridine N atom, with an O-C-C-C torsion angle of À23.55 (18) . The crystal packing involves four hydrogen bonds of the types N-HÁ Á ÁN and N-HÁ Á ÁO. Two separate centrosymmetric rings are formed using N-HÁ Á ÁN and N-HÁ Á ÁO hydrogen bonds that result in a ribbon of 6-aminonicotinamide molecules, joined by the amide and amine functional groups. The remaining two hydrogen bonds are used to generate a threedimensional packing arrangement. Related literature ExperimentalCrystal data