(E)-3-[(Di-methyl-amino)-methyl-idene]-4-phenyl-1H-1,5-benzodiazepin-2(3H)-one.

The asymmetric unit of the title compound, C18H17N3O, consists of two independent mol-ecules, each having an E conformation with respect to the C=C bond between the benzodiazepinone and di-methyl-amine groups. In the crystal, the two independent mol-ecules are linked into a dimer by a pair of N-H⋯O hydrogen bonds.

(E)-3-[(Di-methyl-amino)-methyl-idene]-4-phenyl-1-(prop-2-yn-yl)-1H-1,5-benzodiazepin-2(3H)-one.

The title compound, C21H19N3O, exhibits an E configuration with respect to the C=C bond between the benzodiazepine and tri-methyl-amine groups. The seven-membered diazepine ring displays a boat conformation. In the crystal, mol-ecules are linked by a C-H⋯O hydrogen bond, forming a chain along [110].

2-Isopropyl-4-meth-oxy-5-methyl-phenyl acetate.

In the title compound, C13H18O3, the benzene ring is almost perpendicular to the acet-oxy plane, making a dihedral angle of 89.33 (11)°. In the crystal, mol-ecules are linked by weak C-H⋯O hydrogen bonds, forming a zigzag chain along the c-axis direction.

Ethyl 5,5-dichloro-3-(4-chloro-phen-yl)-3a-methyl-4a-phenyl-3a,4,4a,5-tetra-hydro-3H-aziridino[2,1-d][1,2,4]triazolo[4,3-a][1,5]benzodiazepine-1-carboxyl-ate.

In the title compound, C(27)H(23)Cl(3)N(4)O(2), the seven-membered diazepine ring adopts a boat conformation. The triazole ring makes dihedral angles of 17.24 (8) and 82.86 (8)°, respectively, with the chloro-benzene ring and the benzene ring of the benzodiazepine unit.

N-Paranitrophénylhydrazono-α-(2-méthyl-benzimidazol-1-yl)glyoxylate d'éthyle.

There are two independent mol-ecules in the asymmetric unit of the title compound {systematic name: ethyl 2-(2-methyl-1H-benzimidazol-1-yl)-2-[2-(4-nitro-phen-yl)hydrazinyl-idene]ethano-ate}, C(18)H(17)N(5)O(4). Each mol-ecule and its inversion-related partner are linked by a pair of inter-molecular N-H⋯N hydrogen bonds, forming inversion dimers in the crystal structure.

Diethyl 1,4-bis-(4-nitro-phen-yl)-1,4-dihydro-1,2,4,5-tetra-zine-3,6-dicarboxyl-ate.

The complete mol-ecule of the title compound, C(20)H(18)N(6)O(8), is generated by a crystallographic twofold axis. The dihedral angle between the nitrobenzene rings is 43.5 (2)°. The central six-membered ring exhibits a boat conformation. In the crystal structure, weak inter-molecular C-H⋯O inter-actions are observed.