Crystal structure and Hirshfeld surface analysis of ethyl (E)-4-[(4-hy­droxy-3-meth­oxy-5-nitro­benzyl­idene)amino]­benzoate

The title Schiff base compound, C(17)H(16)N(2)O(6), has an E configuration with respect to the C=N bond, with a dihedral angle between the two benzene rings of 31.90 (12)°. There is an intra­molecular O—H⋯O(nitro) hydrogen bond present forming an S(6) ring motif. In the crystal, mol­ecules are linked by pairs of O—H⋯O hydrogen bonds, forming inversion dimers enclosing an R (2) (2)(4) ring motif. The dimers are linked about an inversion centre by pairs of C—H⋯O hydrogen bonds, which enclose R (2) (2)(22) loops, forming chains propagating along the [10[Image: see text]] direction. Hirshfeld surface analysis and fingerprint plots show enrichment ratios for the H⋯H, O⋯H and C⋯H contacts, indicating a high propensity of such inter­actions in the crystal. Both the nitro group and the CH(3)–CH(2)–O– group are positionally disordered.