2,3-Dimethoxybenzaldehyde isonicotinoylhydrazone chloroform monosolvate, and the mono- and dihydrates of 3,4,5-trimethoxybenzaldehyde isonicotinoylhydrazone: hydrogen-bonded supramolecular structures in one, two and three dimensions

In 2,3-dimethoxybenzaldehyde isonicotinoylhydrazone chloroform monosolvate, C15H15N3O3 center dot CHCl3, the hydrazone molecules are linked by a combination of N-H center dot center dot center dot N and C-H center dot center dot center dot N hydrogen bonds into chains from which the chloroform molecules are pendent. 3,4,5-Trimethoxybenzaldehyde isonicotinoylhydrazone forms two stoichiometric hydrates. In the monohydrate, C16H17N3O4 center dot H2O, the components are linked into sheets by a combination of O-H center dot center dot center dot O, O-H center dot center dot center dot N and N-H center dot center dot center dot N hydrogen bonds, and in the dihydrate, C16H17N3O4 center dot 2H(2)O, a combination of O-H center dot center dot center dot O, O-H center dot center dot center dot N and N-H center dot center dot center dot O hydrogen bonds links the components into a three-dimensional framework structure.