Abstract
In the title compound, C16H9Cl2N5O2, the folded molecular conformation is characterized by a dihedral angle between the two benzene rings of 74.03 (5)°. An intramolecular N—H⋯O hydrogen bond is observed between the H atom of the amide group and a nitro-group O atom. Intermolecular C—H⋯O and N—H⋯N hydrogen bonds feature in the crystal packing.
Highlights
C16H9Cl2N5O2, the folded molecular conformation is characterized by a dihedral angle between the two benzene rings of 74.03 (5)
An intramolecular N—HÁ Á ÁO hydrogen bond is observed between the H atom of the amide group and a nitro-group O atom
Intermolecular C—HÁ Á ÁO and N—HÁ Á ÁN hydrogen bonds feature in the crystal packing
Summary
Key indicators: single-crystal X-ray study; T = 293 K; mean (C–C) = 0.003 A; R factor = 0.052; wR factor = 0.142; data-to-parameter ratio = 16.8. C16H9Cl2N5O2, the folded molecular conformation is characterized by a dihedral angle between the two benzene rings of 74.03 (5). An intramolecular N—HÁ Á ÁO hydrogen bond is observed between the H atom of the amide group and a nitro-group O atom. Intermolecular C—HÁ Á ÁO and N—HÁ Á ÁN hydrogen bonds feature in the crystal packing. Related literature For general background to N-1-diaryl-1H-pyrazol-5-amine derivatives as synthetic intermediates in the preparation of medicinal compounds and the synthesis of the title compound, see: Markwalder et al (2004); Mehdi et al (2010). For the pharmacological activity of the 5-aminopyrazole nucleus, see: Nils et al (2010); Aymn et al (2005)
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