Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| C10H10O2i | 0.93 | 2.51 | 3.138(3) | 125 |
| C5H5AI1ii | 0.97 | 3.04 | 3.807(3) | 137 |
| C7H7I1iii | 0.93 | 3.04 | 3.854(3) | 147 |
Symmetry codes: (i) 
; (ii) 
; (iii) 
.
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