| Parameters | Gas phase | Aqueous phase | ||||
| Diclofenac | Bromfenac | Amfenac | Diclofenac | Bromfenac | Amfenac | |
| O-H | 0.970 | 0.970 | 0.970 | 0.971 | 0.971 | 0.971 |
| C-O | 1.358 | 1.355 | 1.356 | 1.348 | 1.347 | 1.347 |
| C=O | 1.204 | 1.204 | 1.204 | 1.210 | 1.210 | 1.210 |
| HO-C=O | 122.4 | 122.6 | 122.6 | 122.6 | 122.7 | 122.7 |