N′2,N′5-Bis[(E)-2-hydroxybenzylidene]-3,4-dimethylthiophene-2,5-dicarbohydrazide

Abstract

In the title molecule, C22H20N4O4S, both C=N bonds are in an E conformation. The benzene rings form dihedral angles of 12.10 (13) and 25.17 (12)° with the thiophene ring. The dihedral angle between the two benzene rings is 17.59 (14)°. There are two intramolecular O—H...N hydrogen bonds. In the crystal, N—H...O hydrogen bonds connect molecules into chains along [010].