| Wave number (cm−1) | functional group | compounds |
| 3209.67 | O-H stretching | alcohol (strong) |
| 2925.16 | C-H stretching | alkene (medium) |
| 2854.12 | C-H stretching | alkene (medium) |
| 2241.42 | C≡C stretching | alkyne (weak) |
| 1712.34 | C=O stretching | carboxylic acid (strong) |
| 1379.90 | O-H stretching | carboxylic acid (strong) |
| 1241.04 | C-O stretching | alkyl aryl ether (strong) |
| 721.17 | C=C bending | alkene (strong) |