Table 1. Hydrogen-bond geometry (, ).

Cg2 and Cg3 are the centroids of the C4C8/C13 and C8C13 rings, respectively.

DHA	DH	HA	D A	DHA
N1H1AN2i	0.88	2.22	3.005(3)	148
N1H1BN2ii	0.88	2.32	3.129(4)	152
C6H6Cg2iii	0.95	2.60	3.401(3)	142
C11H11Cg3iv	0.95	2.90	3.636(3)	135

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