3,4-Dimethyl-1H-1,2,4-triazepino[2,3-a]benzimidazol-2(3H)-one

Abstract

In the molecule of the title compound, C12H12N4O, a C atom and an N atom of the benzimidazole fused-ring portion are part of a seven-membered ring; this ring adopts a boat-shaped conformation (with the fused-ring atoms representing the stern and the sp3-hybridized C atom the prow). The amino group is a hydrogen-bond donor to the imidazole group of an inversion-related molecule, the pair of N—H...N hydrogen bonds giving rise to a hydrogen-bonded dimer.