| WAVENUMBER CM−1 | INDENTIFICATION |
| 3000 - 2800 | Disappearance of CH |
| 1720 | C=O stretching |
| 1450 - 1350 | Disappearance of C-H bending |
| 1270 - 990 | C-F stretching masking C=O |
| 810,750 | CH2 rocking intensity decreased with a noted broader peak |