Table 3. Hydrogen-bond geometry (Å, °) for I .

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C3—H3⋯Cl1ii	0.95	2.91	3.581 (3)	129
C6—H6⋯Cl1	0.95	2.80	3.447 (3)	126
C7—H7B⋯Cl1iii	0.99	2.89	3.676 (3)	137

Symmetry codes: (ii) x+1, y, z; (iii) -x+1, y+{\script{1\over 2}}, -z+{\script{1\over 2}}.