Crystal structure and Hirshfeld surface analysis of 1-[(1-butyl-1H-1,2,3-triazol-4-yl)meth­yl]-3-methyl­quinoxalin-2(1H)-one

The title compound, C(16)H(19)N(5)O, is built up from a planar quinoxalinone ring system linked through a methyl­ene bridge to a 1,2,3-triazole ring, which in turn carries an n-butyl substituent. The triazole ring is inclined by 67.09 (4)° to the quinoxalinone ring plane. In the crystal, the mol­ecules form oblique stacks along the a-axis direction through inter­molecular C—H(Trz)⋯N(Trz) (Trz = triazole) hydrogen bonds, and offset π-stacking inter­actions between quinoxalinone rings [centroid–centroid distance = 3.9107 (9) Å] and π–π inter­actions, which are associated pairwise by inversion-related C—H(Dhydqn)⋯π(ring) (Dhydqn = di­hydro­quinoxaline) inter­actions. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H⋯H (52.7%), H⋯N/N⋯H (18.9%) and H⋯C/C⋯H (17.0%) inter­actions.