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Журнал структурной химии/2013/№ 4/
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STRUCTURES OF TWO HYDRAZONE COMPOUNDS DERIVED FROM 4-METHYLBENZOHYDRAZIDE

Two hydrazone compounds N?-(2,4-dichlorobenzylidene)-4-methylbenzohydrazide monohydrate (1) and 2-chloro-5-nitro-N?-(4-methylbenzylidene)benzohydrazide (2) derived from 4-methylbenzohydrazide with different benzaldehydes are synthesized and characterized by physicochemical methods and single crystal X-ray diffraction. Compound 1 crystallizes in the orthorhombic space group P212121 with unit cell parameters a = 4.714(2) ?, b = 13.093(3) ?, c = 24.754(3) ?, V = 1527.9(8) ?3, Z = 4, R1 = 0.0812, and wR2 = 0.1623. Compound 2 crystallizes in the monoclinic space group Cc with unit cell parameters a = 11.564(2) ?, b = 13.271(2) ?, c = 9.462(2) ?, b = 96.860(2)°, V = 1441.7(4) ?3, Z = 4, R1 = 0.0461, and wR2 = 0.0896. The crystals of the compounds are stabilized by intermolecular hydrogen bonds as well as p?p stacking interactions.

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The crystals of the compounds are stabilized by intermolecular hydrogen bonds as well as ᄷ stacking interactions. <...> In order to carefully study the detailed structures of such compounds, in the present work, two new hydrazone compounds N-(2,4-dichlorobenzylidene)-4-methylbenzohydrazide monohydrate (1) and 2-chloro-5-nitro-N-(4-methylbenzylidene)benzohydrazide (2) (Scheme 1), derived from 4-methylbenzohydrazide with different aldehydes, were synthesized and structurally characterized. <...> Compound 1 contains a hydrazone molecule and a water molecule. <...> Compound 2 contains only a hydrazone molecule, with no solvent molecules reside in. <...> The water molecules in 1 are linked to the hydrazone molecules through intermolecular O—HᄷO hydrogen bonds. <...> In the crystal structure of 1, the benzohydrazide molecules are linked by water molecules through intermolecular O—HᄷO and N—HᄷO hydrogen bonds to form 1D chains running along the b axis (Fig. 2). <...> In the crystal structure of 2, the benzohydrazide molecules are linked through intermolecular N—HᄷO hydrogen bonds to form 1D chains running along the c axis (Fig. 3). <...> The broad and weak absorption band at about 3430 cm–1 is attributed to the O—H vibrations of the water molecule. <...> The sharp and middle bands at about 3215 cm–1 are assigned to the N—H vibrations. <...> We acknowledge the Chongqing Three Gorges University for funding this Supplementary material. <...> Two hydrazone compounds N?-(2,4-dichlorobenzylidene)-4-methylbenzohydrazide monohydrate (1) and 2-chloro-5-nitro-N?-(4-methylbenzylidene)benzohydrazide (2) derived from 4-methylbenzohydrazide with different benzaldehydes are synthesized and characterized by physicochemical methods and single crystal X-ray diffraction. <...> The crystals of the compounds are stabilized by intermolecular hydrogen bonds as well as p?p stacking interactions.. <...>
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