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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯N5	0.88 (1)	1.92 (1)	2.787 (5)	169 (4)
N4—H4⋯N8ii	0.88 (1)	1.90 (1)	2.773 (5)	175 (4)
N6—H6⋯Cl1iii	0.88 (1)	2.37 (2)	3.224 (4)	167 (5)
N7—H7⋯Cl2iv	0.88 (1)	2.35 (1)	3.230 (4)	178 (4)

Symmetry codes: (ii) ; (iii) ; (iv) .