3-Bromo-6-nitro-1-(prop-2-ynyl)-1H-indazole

Abstract

In the title compound, C10H6BrN3O2, the indazole fused-ring system is nearly planar (r.m.s. deviation = 0.008 Å); its nitro substituent is nearly coplanar with the fused ring [dihedral angle = 4.5 (2)°]. In the crystal, adjacent molecules are linked by weak acetylene–nitro C—H...O hydrogen bonds, generating a helical chain running along the b axis.