Crystal structure of (E)-N′-(3-fluoro-2-hy­droxy­benzyl­idene)isonicotinohydrazide

In the title compound, C(13)H(10)FN(3)O(2), the mol­ecule has an E conformation with respect to the C=N bond of the hydrazone bridge. The dihedral angle between the isonicotinoyl and fluoro­phenol moieties is 4.03 (4)°, and an intra­molecular O—H⋯N hydrogen bond generates an S(6) ring motif. In the crystal, mol­ecules are linked by N—H⋯N and C—H⋯N hydrogen bonds, forming chains propagating along the a-axis direction. The chains are linked by C—H⋯O hydrogen bonds, resulting in the formation of layers lying parallel to the ab plane. The crystal structure also features π–π inter­actions [centroid-to-centroid distance = 3.6887 (8) Å].