2-Allyl-7-nitro-2H-indazole

• Main Authors: Assoman Kouakou, El Mostapha Rakib, Domenico Spinelli, Mohamed Saadi, Lahcen El Ammari
• Format: Article
• Language: English
• Published: International Union of Crystallography 2013-11-01
• Series: Acta Crystallographica Section E
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S1600536813026743

The asymmetric unit of the title compound, C10H9N3O2, contains two independent molecules linked by a C—H...N hydrogen bond. Each molecule has a similar conformation, being built up from fused five- and six-membered rings, each linked to an ally and nitro group, respectively. The indazole ring system makes dihedral angles of 2.7 (2) and 2.2 (2)°, respectively, with the plane through the nitro group. The allyl group is nearly perpendicular to the indazole system, as indicated by the N—N—C—C torsion angles of −75.3 (2) and −82.2 (2)°, this being the most important difference between the conformations of the two molecules. In the crystal, molecules are linked by C—H...O and π–π [inter-centroid distance = 3.6225 (8) Å] interactions to form a three-dimensional network.