Table 2. Selected bond lengths (Å) of nicotinohydrazide (I), picolinic acid hydrazide (II) and isonicotinohydrazide (III).
| (I) | (II) | (III) | |
|---|---|---|---|
| N2—N3 | 1.418 (2) | 1.422 | 1.429 |
| C6—N2 | 1.335 (2) | 1.334 | 1.346 |
| C6—O1 | 1.231 (2) | 1.235 | 1.235 |
| C6—C2 | 1.503 (2) | 1.507 | 1.513 |
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