2-Amino-7-oxo-4,5,6,7-tetra­hydro-1-benzothio­phene-3-carbonitrile

In the title compound, C9H8N2OS, the benzothio­phene ring is substituted with amino, oxo and carbonitrile groups. The thio­phene ring is essentially planar (r.m.s. deviation = 0.0003 Å), while the cyclo­hexene ring is in a half-chair conformation. In the crystal, N-H...O hydrogen bonds generate chains of mol­ecules in a zigzag pattern along the b axis. Pairs of N-H...N hydrogen bonds form centrosymmetric head-to-head dimers about inversion centres, corresponding to an R22(12) graph-set motif. In addition, rather weak N-H...S inter­actions are also present in the structure and the supra­molecular assembly is further consolidated by [pi]-[pi] stacking inter­actions between the benzothio­phene rings, disposed at a distance of 3.742 (3) Å