Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N11—H11A⋯O2	0.92	1.95	2.863 (13)	170
N11—H11B⋯Cl12i	0.92	2.64	3.409 (10)	141
N12—H12A⋯Cl11i	0.92	2.63	3.299 (9)	131
N12—H12B⋯O2	0.92	1.93	2.843 (11)	175
N21—H21A⋯Cl22ii	0.92	2.55	3.238 (10)	132
N21—H21B⋯O1	0.92	1.91	2.821 (12)	173
N22—H22A⋯O1	0.92	1.94	2.843 (11)	165
N22—H22B⋯Cl21ii	0.92	2.64	3.354 (10)	136

Symmetry codes: (i) ; (ii) .