Comparison of the structure of (E)-2-(2-benzylidenehydrazinylidene)quin­oxaline with those of its chloro- and bromobenzylidene analogues

The structures of (E)-2-(2-(phenylidene)hydrazinyl)quinoxaline and six Cl and Br derivatives have similar supramolecular structures involving an N-H...N hydrogen bond and [pi]-[pi] stacking interactions.