Synthesis and Crystal Structures of 4-Chloro-N′-(4-hydroxy-3-nitrobenzylidene)benzohydrazide monohydrate and 4-Chloro-N′-(4-hydroxy-3-methoxybenzylidene)benzohydrazide monohydrate

Two new hydrazone compounds, 4-chloro-N0-(4hydroxy-3-nitrobenzylidene)benzohydrazide monohydrate (1) and 4-chloro-N0-(4-hydroxy-3-methoxybenzylidene)benzohydrazide monohydrate (2), were synthesized and characterized by physico-chemical methods and single crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic space group P21/c with unit cell parameters a = 23.257(3) A, b = 4.829(1) A, c = 12.763(2) A, b = 96.017(2) , V = 14 25.5(5) A, Z = 4, R1 = 0.0525, and wR2 = 0.1120. Compound 2 crystallizes in the monoclinic space group P21/c with unit cell parameters a = 8.103(3) A, b = 21.321(3) A, c = 10.594(3) A, b = 120.281(2) , V = 1580.5(8) A, Z = 4, R1 = 0.0480, and wR2 = 0.1078. Both compounds contains a hydrazone molecule and a water molecule. The crystals of the compounds are stabilized by N–H O, O– H O, and O–H N hydrogen bonds.