Table 1. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2A⋯Cl2i	0.90 (1)	2.18 (1)	3.0702 (17)	170 (2)
N2—H2B⋯Cl1i	0.89 (1)	2.16 (1)	3.0482 (19)	173 (2)
N4—H4A⋯Cl2ii	0.90 (1)	2.15 (1)	3.0361 (18)	168 (2)
N4—H4B⋯Cl1	0.89 (1)	2.26 (1)	3.1157 (18)	163 (2)

Symmetry codes: (i) ; (ii) .