2-(3-Methoxy­salicylideneamino)-1H-benzimidazole

The molecule of the title compound, C₁₅H₁₃O₂N₃, deviates slightly from planarity. There is a strong intramolecular N...O hydrogen bond of 2.5831 (19) Å. The molecule exists in the phenol–imine form and the dihedral angle between the two aromatic ring systems is 14.61 (5)°.

(Z)-Ethyl 4-chloro-2-[2-(2-methoxy­phen­yl)hydrazono]-3-oxobutanoate

The title compound, C₁₃H₁₅ClN₂O₄, adopts a keto–hydrazo tautomeric form stabilized by intra­molecular N—H...O hydrogen bonds. The phenyl­hydrazone fragment is planar within ±0.028 (2) Å. The dihedral angle between the phenyl­hydrazone and oxobutanoate planes is 8.15 (9)°. Symmetry-related mol­ecules are linked via C—H...O hydrogen bonds to form chains along [101].