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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C8—H8⋯F6	0.93	2.59	3.486 (8)	162
C11—H11⋯F5i	0.93	2.55	3.363 (8)	146
C16—H16⋯F4ii	0.93	2.59	3.289 (7)	132
C21—H21B⋯F2iii	0.96	2.64	3.516 (8)	152

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