title: N'-[1-(2,4-Dioxo-3,4-dihydro-2H-1-benzopyran-3-yl-idene)eth-yl]thiophene-2-carbo-hydrazide.
abstract: The title compound, C(16)H(12)N(2)O(4)S, was obtained by the condensation of 3-acetyl-4-hy-droxy-coumarin with thien-2-ylcarbonyl hydrazide. The pyran ring adopts a 2,4-dione tautomeric form. The benzopyran ring system is almost coplanar with the thio-phene ring [dihedral angle 0.9 (2)°]. The exocyclic C=C double bond has an E geometry. The mol-ecular conformation is stabilized by an intra-molecular N-H⋯O hydrogen bond. In the crystal, inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into chains along the a axis.
authors.forename: Madeleine
authors.initials: M
authors.lastname: Helliwell
authors.forename: Despina A
authors.initials: DA
authors.lastname: Nasiopoulou
authors.forename: Philip A
authors.initials: PA
authors.lastname: Harris
authors.forename: Antigoni
authors.initials: A
authors.lastname: Kotali
authors.forename: John A
authors.initials: JA
authors.lastname: Joule