4-Bromo-2-meth­oxy-6-(1-phenyl-1H-benzimidazol-2-yl)phenol

The title compound, C20H15BrN2O2, crystallized with three independent molecules in the asymmetric unit. Intramolecular O—H⋯N hydrogen bonds induce coplanarity of the substituted benzene ring and the benzimidazole ring, with mean deviations from the planes of 0.0931 (10), 0.0448 (10) and 0.0083 (11) Å in the three mol­ecules

(Z)-4-[(2-Amino­anilino)(phen­yl)methyl­idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one

The mol­ecule of the title compound, C23H20N4O, assumes a non-planar conformation in which the pyrazolone ring forms dihedral angles of 10.33 (11), 65.34 (11) and 63.52 (10)° with the three benzene rings. In the crystal, the mol­ecules are linked by inter­molecular N—H⋯N hydrogen bonds, generating chains parallel to the b axis. The secondary amino group is involved in an intra­molecular N—H⋯O hydrogen bond

2-{[2-(2-Hy­droxy-3-meth­oxy­benzyl­idene)hydrazin-1-yl­idene]meth­yl}-6-meth­oxy­phenol

The title compound, C16H16N2O4, was obtained from the reaction of hydrazine hydrate and o-vanilin in absolute ethanol. The mol­ecule is almost planar (except for the methyl H atoms), with a mean deviation from the plane of 0.0259 Å. The mol­ecular structure also exhibits an approximate non-crystallographic twofold axis. Intra­molecular O—H⋯N hydrogen bonds occur. In the crystal, inter­molecular C—H⋯O hydrogen bonds generate mol­ecular zigzag sheets. The sheets stack through C—H⋯π inter­actions, leading to a three-dimensional-network