and isonicotinamides crystalstructures is determined and studied for their weak intermolecular interactions. The molecularstructure is non-planar in general with the pyridine ring twisted with respect to the central hydrazone moiety. The crystalstructures depict various intermolecular interactions, including N–H⋯O, C–H⋯O, N–H⋯N, and C–H⋯N hydrogenbonding along with weak C–H … π and π … π contacts