Table 6.
Bond length values of the discussed benzimidazoles
| Chemical bond | Length (Å) | |||||
|---|---|---|---|---|---|---|
| M-1 | M-2 | M-3 | M-4 | M-5 | 1B | |
| C8-C10 | 1.506 | 1.509 | 1.511 | 1.506 | 1.505 | 1.507 |
| C10-C12 | 1.528 | 1.520 | 1.517 | 1.517 | 1.517 | 1.518 |
| C10-O11 | 1.415 | 1.430 | 1.426 | 1.438 | 1.438 | 1.427 |
| O11-H20 | 0.966 | 0.963 | 0.961 | 0.963 | 0.963 | 0.961 |
| N7-C14 | 1.445 | 1.453 | 1.447 | 1.442 | 1.443 | – |
| C14-N15 | 1.446 | 1.441 | 1.458 | 1.446 | 1.445 | – |
| N15-C16 | 1.458 | 1.460 | 1.429 | 1.370 | 1.374 | – |
| C16-C17 | 1.519 | 1.519 | 1.397 | 1.407 | 1.404 | – |
| C17-X18 | 1.454 | 1.421 | 1.385 | 1.373 | 1.367 | – |
| X18-C19 | 1.451 | – | 1.387 | 1.388 | 1.396 | – |
| C19-Y20 | – | – | 1.386 | 1.467 | 1.493 | – |
| N21-O22 (NO2) | – | – | – | 1.213 | – | – |
| C-O (COOH) | – | – | – | – | 1.354 | – |
| C = O (COOH) | – | – | – | 1.196 | – | |
| OH (COOH) | – | – | – | 0.961 | – | |