title: (E)-4-Methyl-N'-[(4-oxo-4H-chromen-3-yl)methyl-idene]benzohydrazide.
abstract: In the title chromone-tethered benzohydrazide derivative, C18H14N2O3, the 4H-chromen-4-one and the -CH=N-NH-CO- units are each essentially planar, with the largest deviations from thei planes being 0.052 (2) and 0.003 (2) Å, respectively. The dihedral angles between the 4H-chromen-4-one and the -CH=N-NH-CO- units, the 4H-chromen-4-one unit and the benzene ring of the 4-tolyl group, and the benzene ring of the 4-tolyl group and the -CH=N-NH-CO- unit are 8.09 (7), 9.94 (5) and 17.97 (8)°, respectively. In the crystal, the mol-ecules form two types of centrosymmetric dimers: one by N-H⋯O hydrogen bonds and the other by π-π stacking inter-actions between the 4H-chromen-4-one unit and the 4-tolyl group [centroid-centroid distance = 3.641 (5) Å]. These dimers form one-dimensional assemblies extending along the a-axis direction. Additional π-π stacking inter-actions between two 4H-chromen-4-one units [centroid-centroid distance = 3.591 (5) Å] and two 4-tolyl groups [centroid-centroid distance = 3.792 (5) Å] organize the mol-ecules into a three-dimensional network.
authors.affiliation: School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan.
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Ishikawa
authors.affiliation: School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan.
authors.forename: Kohzoh
authors.initials: K
authors.lastname: Watanabe