Crystal structure of 3-amino-2-ethylquinazolin-4(3H)-one

Abstract

The mol­ecule of the title compound, C10H11N3O, is planar, including the ethyl group, as indicated by the N—C—C—C torsion angle of 1.5 (2)°. In the crystal, inversion-related mol­ecules are stacked along the a axis. Mol­ecules are oriented head-to-tail and display π–π inter­actions with a centroid-to-centroid distance of 3.6664 (8) Å. N—H⋯O hydrogen bonds between mol­ecules generate a ‘step’ structure through formation of an R 2 2(10) ring.