In the title compound, C(15)H(12)Cl(2)N(2)O(2)·CH(3)OH, the hydrazone mol-ecule displays an E configuration about the C=N bond. The dihedral angle between the two benzene rings is 4.6 (2)°. In the crystal structure, the hydrazone and methanol mol-ecules are linked into a chain propagating along the a axis via N-H⋯O and O-H⋯O hydrogen bonds.

Technical iodine was found to catalyze the condensation between 2-aminobenzohydrazide (1) and some aldehydes and ketones in absolute ethanol under mild conditions to afford hydrazone and quinazoline derivatives, respectively. Condensation of 1 with terephthalaldehyde (2) in 1 : 1 molar ratios afforded the hydrazone 3, while hydrazone 4 was formed on using a double molar ratio of 1. On the other...

The title compound, C(11)H(11)N(3)O(2)·H(2)O, was obtained by the reaction of 2-acetyl-phenol with cyano-acetohydrazide in methanol. The asymmetric unit contains two hydrazone mol-ecules and two water mol-ecules of crystallization. There is an intra-molecular O-H⋯N hydrogen bond in each hydrazone mol-ecule. The crystal structure is stabilized by inter-molecular N-H⋯O, O-H⋯O and O-H⋯N hydrogen b...