Crystal structure and Hirshfeld surface analysis of (E)-6-(4-hydroxy-3-methoxystyryl)-4,5-dihydropyridazin-3(2H)-one

In the title compound, C 13 H 14 N 2 O 3 , the dihydropyridazine ring (r.m.s. deviation = 0.166 Å) has a screw-boat conformation. The dihedral angle between its mean plane and the benzene ring is 0.77 (12)°. In the crystal, intermolecular O—H...O hydrogen bonds generate C (5) chains and N—H...O hydrogen bonds produce R 2 2 (8) motifs. These types of interactions lead to the formation of layers parallel to (12\overline{1}). The three-dimensional network is achieved by C—H...O interactions, including R 2 4 (8) motifs. Intermolecular interactions were additionally investigated using Hirshfeld surface analysis and two-dimensional fingerprint plots. The most significant contributions to the crystal packing are by H...H (43.3%), H...C/C...H (19.3%), H...O/H...O (22.6%), C...N/N...C (3.0%) and H...N/N...H (5.8%) contacts. C—H...π interactions and aromatic π–π stacking interactions are not observed.

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