2,3-Dimethyl-6-nitroquinoxaline

oleh: Raza Murad Ghalib, Rokiah Hashim, Sayed Hasan Mehdi, Jia Hao Goh, Hoong-Kun Fun

Format: Article
Diterbitkan: International Union of Crystallography 2010-07-01

Deskripsi

The asymmetric unit of the title quinoxaline compound, C10H9N3O2, contains two crystallographically independent molecules (A and B). The quinoxaline ring systems are essentially planar, with maximum deviations of 0.006 (1) and 0.017 (1) Å, respectively, for molecules A and B. In molecule A, the dihedral angle formed between the quinoxaline ring system and nitro group is 10.94 (3)° [6.31 (13)° for molecule B]. In the crystal, molecules are linked into chains propagating along [001]: one forms zigzag chains linked by C—H...O hydrogen bonds, whilst the other forms ladder-like chains by way of C—H...N and C—H...O hydrogen bonds. The packing is further consolidated by weak π–π interactions [range of centroid–centroid distances = 3.5895 (7)–3.6324 (7) Å].