(5aR,9aR)-2,4-Dimethyl-5a,6,7,8,9,9a-hexahydro-1H-1,5-benzodiazepine

The title compound, C₁₁H₁₈N₂, packs in the solid state with one molecule in the asymmetric unit but with the chiral molecule disordered over two orientations related by twofold rotation. Thus, the molecule is the average of these two orientations with the amine H atom present with half occupancy at each N atom and `pseudo-aromatic' character in the N—C—C—C—N moiety of the diazepine ring. The molecules are linked to form infinite chains parallel to the c axis via N—H...N hydrogen bonds across crystallographic twofold axes, with N...N 3.224 (3) and 3.110 (3) Å (the hydrogen-bonded H atom is disordered).

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