organic compounds
Open access
In the title compound, C14H14BrN5O3, the mean plane of the imidazole ring (r.m.s deviation = 0.004 Å) forms a dihedral angle of 58.13 (7)° with the benzene ring. In the crystal, molecules are linked via N—HO, C—HO and C—HN hydrogen bonds into a three-dimensional network. A short BrBr contact of 3.4932 (2) Å also occurs.
organic compounds
Open access
In the title compound, C14H15N5O4, the central –C=N—N—C(=O)—C– bridge is nearly planar [maximum deviation = 0.037 (1) Å] and forms dihedral angles of 7.37 (9) and 73.33 (5)°, respectively, with the benzene and imidazole rings. The dihedral angle between the benzene and imidazole rings is 66.08 (9)°. The methoxy and nitro groups are nearly coplanar with the benzene and imidazole rings, respectively, with a C—O—C—C torsion angle of 5.9 (2)° and an O—N—C—C angle of −0.2 (2)°. In the crystal, molecules are linked by a pair of N—HO hydrogen bonds with an R22(8) ring motif, forming an inversion dimer. The dimers are further interconnected by C—HO hydrogen bonds into a sheet parallel to the (111) plane. A C—Hπ interaction is also observed between the sheets.