Crystal structure of (E)-4-hy-droxy-N′-(3-meth-oxy-benzyl-idene)benzohydrazide

摘要

The title compound, C15H14N2O3, crystallizes with two independent mol-ecules (A and B) in the asymmetric unit that differ in the orientation of the 3-meth-oxy-phenyl group with respect to the methyl-idenebenzohydrazide unit. The dihedral angles between the two benzene rings are 24.02?(10) and 29.30?(9)° in mol-ecules A and B, respectively. In mol-ecule A, the meth-oxy group is twisted slightly relative to its bound benzene ring, with a Cmeth-yl—O—C—C torsion angle of 14.2?(3)°, whereas it is almost co-planar in mol-ecule B, where the corresponding angle is ?2.4?(3)°. In the crystal, the mol-ecules are linked by N—H?O, O—H?N and O—H?O hydrogen bonds, as well as by weak C—H?O inter-actions, forming sheets parallel to the bc plane. The N—H?O hydrogen bond and weak C—H?O inter-action link different mol-ecules (A?B) whereas both O—H?N and O—H?O hydrogen bonds link like mol-ecules (A?A) and (B?B). Pairs of inversion-related B mol-ecules are stacked approximately along the a axis by π–π inter-actions in which the distance between the centroids of the 3-meth-oxy-phenyl rings is 3.5388?(12)??. The B mol-ecules also participate in weak C—H?π inter-actions between the 4-hy-droxy-phenyl and the 3-meth-oxy-phenyl rings.