(E)-2-Phenyl-4-styryl-2,3-dihydro-1H-1,5-benzodiazepine hemihydrate

The unit cell contains eight molecules of the title compound, with half a water molecule per main molecule, C23H20N2·0.5H2O. The seven-membered diazepine ring adopts a twist-boat conformation and makes dihedral angles of 85.08 (7) and 32.79 (7)° with the phenyl and styryl substituents, respectively. In the crystal, the organic molecules are linked by C—H...N hydrogen bonds into chains running along the b-axis direction. The water molecule, located on a twofold rotation axis, forms hydrogen bridges, connecting two adjacent chains.