| Band range (cm−1) | MWL | IIL | EOL | Assignment |
| Intensity | ||||
| 3500 - 3300 | 1.13 | 1.12 | 1.54 | Presence of alcoholic and phenolic OH groups stretching vibrations |
| 3000 - 2842 | 0.52 | 0.69 | 0.66 | C-H stretching in methyl and methylene groups |
| 0.00 | 0.00 | 0.36 | Vibrations of CH2 anf CH3 groups | |
| 1740 - 1720 | 0.71 |
|
| Alcoholic Acetate carbonyl |
| 1719 - 1705 |
|
| 0.80 | C=O stretch in unconjugated ketnoes, carbonyl and ester groups |
| 1654 |
| 1.04 |
| C=O stretch in unconjugated p-sybst. aryl ketones |
| 1616 - 1600 | 0.82 | 0.00 | 1.02 | C=C stretching of aromatic ring in lignin |
| 1567 |
| 0.99 |
| C=C stretching (ionic compounds only) |
| 1515 - 1505 | 4.00 | 1.00 | 1.00 | C=C stretching of aromatic ring in lignin |
| 1470 - 1460 | 0.87 | 0.87 | 0.89 | C-H deformation; asym, in -CH3 and -CH2- |
| 1460 - 1422 | 0.73 | 0.78 |
| Aromatic skeletal vibrations combined with C-H in plane deformation |
| 1386 - 1371 | 0.62 | 0.65 |
| C-H deformation symmetric |
| 1330 - 1323 | 0.65 | 0.69 |
| S ring plus G ring condensed; i.e. G ring substituted in pos. 5 |
| 1270 - 1260 | 1.19 | 0.76 | 1.05 | G ring plus C=O stretch |
| 1230 - 1217 | 1.17 | 0.80 | 1.20 | C-C, C-O AND C=O stretching of G |
| 1166 - 1163 |
| 0.66 |
| C-N stretch in aliphatics |
| 1128 - 1118 | 1.17 | 0.98 | 1.79 | aromatic C-H deformation of S, plus secondary alcohols + C=O stretch |
| 1088 |
| 0.80 |
| C-O deformation in secondary alcohols and aliphatic ethers |
| 1040 - 1030 | 1.10 | 0.90 | 0.52 | C-O stretching of primary alcohols |
| 835 - 834 | 0.23 | 0.17 | 0.16 | C-H out of plane in positions 2, and 6 of S, and in all positions of H units |