Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| O2H2AO1 | 0.82 | 1.74 | 2.501(3) | 154 |
| C6H6O1 | 0.93 | 2.29 | 2.933(4) | 126 |
| C10H10BO2i | 0.96 | 2.55 | 3.444(4) | 155 |
| C16H16O2ii | 0.93 | 2.56 | 3.405(4) | 151 |
Symmetry codes: (i) 
; (ii) 
.
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