3‐Butyl‐1‐(5‐nitro­benzo­[c][1,2]­thia­zol‐3‐yl)‐3‐phenyl­triazene

The mol­ecule of the title compound, C₁₇H₁₇N₅O₂S, consists of three π systems, viz. two aromatic rings and the triazene moiety, which are mutually deconjugated although coplanar. The n‐butyl chain is roughly perpendicular to the molecular plane, with the terminal methyl­ene and methyl groups disordered between two equally populated positions. The mol­ecules in the crystal associate in an antiparallel fashion, forming dimers across the centre of symmetry, the principal intradimer interaction being stacking of the π‐electron portions of the mol­ecules.