3-[(E)-4-(2-Nitro-phen-yl)vin-yl]-1-(tri-fluoro-meth-yl)-1,2,4-triazolo[4, 3-a]quinoxaline

Abstract

In the title mol-ecule, C18H10F3N5O2, the 1,2,4-triazolo[4,3-a]quinoxaline unit is nearly planar. The central pyrazine ring makes dihedral angles of 1.67 (6) and 2.44 (5) with the 1,2,4-triazole and fused benzene ring, respectively. The nitro-phenyl ring makes dihedral angles of 2.82 (6), 3.15 (6) and 3.63 (6) with the triazole, pyrazine and benzene rings, respectively. The nitro group is slightly twisted away from the plane of the attached benzene ring. C - H?O and C - H?F hydrogen bonds are found in the crystal structure. International Union of Crystallography 2007.