Table 2. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| N2—H2⋯O2 | 0.90 (4) | 1.89 (4) | 2.777 (4) | 169 (4) |
| O2—H2A⋯Br2i | 0.85 (4) | 2.57 (4) | 3.399 (3) | 165 (4) |
| O2—H2B⋯O1ii | 0.86 (3) | 1.93 (4) | 2.762 (4) | 165 (5) |
Symmetry codes: (i) 
; (ii) 
.
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