(E)-N′-(2-Hydroxybenzylidene)-2-(4-isobutylphenyl)propanohydrazide

The title hydrazide compound, C(20)H(24)N(2)O(2), exists in a trans configuration with respect to the acyclic C=N bond and an intramolecular O-H center dot center dot center dot N hydrogen bond generates an S(6) ring motif. The mean plane through the formohydrazide unit is essentially planar [maximum deviation = 0.025 (2) angstrom], and forms dihedral angles of 24.45 (16) and 87.14 (16)degrees with the two benzene rings. In the crystal structure, intermolecular N-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds link neighbouring molecules into extended chains along the c axis, which incorporate R(2)(2)(16) ring motifs. An intermolecular C-H center dot center dot center dot pi interaction is also observed.