organic compounds
Open access
The title Schiff base, C19H24N2O3, exists in the crystal structure in the phenol–imine tautomeric form with an intramolecular O—HN hydrogen bond. The planes of the aromatic rings form a dihedral angle of 36.8 (8)°. The crystal packing is characterized by C—HO hydrogen bonds and π–π stacking interactions [centroid–centroid distance = 3.478 (4)Å].
organic compounds
Open access
The title Schiff base, C13H13NO2S, adopts the phenol–imine tautomeric form and reveals an intramolecular O—HN hydrogen bond involving the hydroxy group and the imino N atom, forming an S(6) ring. The molecule is highly twisted with respect to the central imine group, which is reflected in the dihedral angle of 67.83 (10)° formed by the thienyl and phenol rings. The crystal packing is characterized by weak C—HO and C—Hπ interactions.
organic compounds
Open access
The title compound, C16H19N3O4S, is almost planar, with a dihedral angle of 2.88 (9)° between the mean planes of the benzene and thiazole rings. The molecule adopts an E conformation about the two C=N bonds, with a C—N—N—C torsion angle of −177.01 (11)°. An intramolecular C—HO hydrogen bond exists between a thiazole methyl group and the formic acid ethyl ester carbonyl O atom. In the crystal, molecules are linked by O—-HO hydrogen bonds, forming chains propagating along [2-10]. The chains are linked via C—HO hydrogen bonds with R22(12) ring motifs, forming sheets lying parallel to (12-2). The sheets are further linked through out-of-plane C—HN hydrogen bonds with R22(12) ring motifs and C—Hπ interactions, forming an interesting three-dimensional supramolecular architecture.