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Selected hydrogen bond short contact distances in compound 1b.
| D–H ⋯ A | D–A (Å) | angle DHA (°) |
|---|---|---|
| N2–H2 ⋯ Cl2 | 3.218 (6) | 151 |
| N3–H3A ⋯ Cl2 | 3.331 (6) | 138 |
| N3–H3A ⋯ Cl4 | 3.306 (6) | 140 |
| N3–H3B ⋯ Cl1 | 3.308 (6) | 149 |
| N3–H3B ⋯ Cl3 | 3.349 (6) | 131 |
| N3–H3C ⋯ O1 | 2.889 (6) | 172 |
