Abstract
In the title compound, C16H18N4O4, the molecule assumes an E conformation with respect to the N=N double bond. The aromatic rings are not coplanar, with a dihedral angle of 7.51 (8)°. The nitro group is tilted by 4.71 (11)° relative to the attached benzene ring. In the crystal, molecules are connected through O—H⋯O hydrogen bonds forming a double-stranded chain parallel to the b axis.
Highlights
E conformation with respect to the N N double bond
Molecules are connected through O—H O hydrogen bonds forming a doublestranded chain parallel to the b axis
Single crystals suitable for X-ray analysis were obtained by slow evaporation of a purified dye solution in n-propanol
Summary
R factor = 0.044; wR factor = 0.152; data-to-parameter ratio = 12.2. E conformation with respect to the N N double bond. The aromatic rings are not coplanar, with a dihedral angle of. The nitro group is tilted by 4.71 (11) relative to the attached benzene ring. Molecules are connected through O—H O hydrogen bonds forming a doublestranded chain parallel to the b axis
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