Table 3. Summary of short inter­atomic contacts (Å) in (I)^a .

Contact	Distance	Symmetry operation
(I)
H6B⋯H72A	2.35	x, y, z
H5B⋯C2A	2.75	x, y, z
H5B⋯C3A	2.72	x, y, z
H2B⋯C5B	2.67	x, 2 − y,  + z
C11A⋯Cl1A	3.3184 (7)	− x,  − y, −z
Cl1B⋯Cl1B	3.4322 (7)	1 − x, 2 − y, 2 − z
(II)
H8B⋯H8B	2.21	−x, 2 − y, 1 − z
H3⋯C13	2.74	−x, 1 − y, 1 − z
H3⋯C14	2.72	−x, 1 − y, 1 − z
H6⋯C1	2.82	1 − x,  + y,  − z
H6⋯C2	2.62	1 − x,  + y,  − z
H11⋯C6	2.80	−x, 2 − y, 1 − z
Br1⋯Br2	3.5242 (4)	1 + x, y, 1 + z

Notes: (a) The inter­atomic distances are calculated in Crystal Explorer (Turner et al., 2017 ▸) whereby the X—H bond lengths are adjusted to their neutron values.