Source of material [3,4]Dioxolebenzohydrazide (18.2 mg, 0.1 mmol) was dissolved in methanol (10 ml), then 3,5-dichloro-2-hydroxybenzaldehyde (19.2 mg, 0.1 mmol) was added slowly into the solution, and the mixture was stirred at room temperature for 3h.The resulting solution was left in air for af ew days, yielding colorless blockshaped crystals. Experimental details DiscussionHyrazone compounds have shown interesting structures and biological properties. Recently, agreat deal of hydrazone derivatives and their metal complexes have been reported [1][2][3][4][5]. As part of the ongoing investigation of the crystal structure of such compounds, the crystal structure of anew hydrazone compound is reported in this paper. The molecular structure of the title compound consists of a [3,4]dioxolebenzohydrazide and a3 ,5-dichloro-2-hydroxybenzylidene groups that are located on opposite sides of the C=N bond showing an E configuration. The dihedral angle between the two substituted benzene rings C1-C6 and C9-C14 is 4.5(2)°,indicating the molecule is nearly coplanar. The crystal structure involves an intramolecular O1−H1···N1 hydrogen bond. The methanol molecules are linked to the hydrazone molecules through intermolecular N2−H2···O5 and O5−H5···O2 hydrogen bonds. The bond lengths and angles are in good agreement with the corresponding values observed in the similar structures [6][7][8]. The torsion angles of C7−N1−N2−C8 and N1−N2−C8−C9 are 0.4(2) and 3.0(2)°,respectively.

The title compound, C19H14FIN2O4, known as a protox inhibitor, was synthesized from flumioxazin. The cyclo­hexene ring in the mol­ecule is in a distorted chair conformation. The mol­ecules are connected into two‐dimensional layers by C=O⋯I interactions.

Source of material [3,4]Dioxolebenzohydrazide (18.2 mg, 0.1 mmol) was dissolved in methanol (10 ml), then 2-chloro-5-nitrobenzaldehyde (18.6 mg, 0.1 mmol) was added slowly into the solution, and the mixture was stirred at room temperature for 3h.The resulting solution was left in air for afew days, yielding colorless block-shaped crystals. Experimental details

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The title compound, C21H22N2O3, was synthesized by the reaction of tert-butyl­hydrazine with phthalic anhydride and further O-benzoyl­ation of the resulting inter­mediate by 3,5-dimethyl­benzoyl chloride. Inter­molecular C—H⋯O=C inter­actions link the mol­ecules into layers.