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

Cg4 is the centroid of the C1A–C6A ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2B—H2BN⋯O1A	0.775 (17)	2.147 (18)	2.8550 (14)	152.0 (17)
C1B—H1BA⋯O1Ai	0.95	2.42	2.9216 (14)	113
C3B—H3BA⋯Cg4ii	0.95	2.44	3.3674 (14)	166
C11B—H11A⋯Cg4iii	0.95	2.91	3.7535 (17)	148

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