Table 1. Hydrogen-bond geometry and CH and CO interactions (, ).

Cg1 and Cg2 are the centroids of the N1/N2/C7C9 and C11C14/C19/O2 rings, respectively.

DHA	DH	HA	D A	DHA
C6H6O1	0.93	2.28	2.911(2)	124
C12H12O1	0.93	2.38	3.004(2)	124
C13H13O1i	0.93	2.53	3.2577(19)	136
C10H10A Cg1ii	0.96	2.79	3.6812(17)	155
C7O1Cg2iii	1.23(1)	3.65(1)	3.9797(18)	96(1)

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