2-[(E)-2-(3,4-Di­chloro­benzyl­idene)hydrazin-1-yl]quinoxaline

The 21 non-H atoms of the title compound, C₁₅H₁₀Cl₂N₄, are almost planar (r.m.s. deviation = 0.032 Å); the conformation about the N=C bond [1.277 (6) Å] is E. In the crystal, zigzag supra­molecular chains along the c axis (glide symmetry) are formed via N—H...N hydrogen bonds. These associate along the b axis by π–π inter­actions between the fused and terminal benzene rings [inter­centroid distance = 3.602 (3) Å] so that layers form in the bc plane.

7-Chloro-4-(2-hy­droxy­ethyl­amino)­quinolin-1-ium chloride

In the title salt, C₁₁H₁₂ClN₂O⁺·Cl⁻, the ten non-H atoms comprising the quinolinium residue are coplanar (r.m.s. deviation = 0.041 Å) and the hy­droxy­ethyl group is approximately perpendicular to this plane [C_ring—N—C_methyl­ene—C torsion angle = −74.61 (18)°]. A supra­molecular chain aligned along [101] mediated by charge-assisted O/N—H...Cl⁻ hydrogen bonds features in the crystal packing. Chains are connected into a three-dimensional architecture by C—H...O(hy­droxy) inter­actions.