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Comparison of the infrared peak positions.
| Peak Position | Functional Groups | Absorption Type |
|---|---|---|
| 3350 cm−1 | –OH | extensional vibration |
| 2870 cm−1 | –CH3 | stretch vibration |
| 2850 cm−1 | –CH2- | stretch vibration |
| 1710 cm−1 | –C=O | extensional vibration |
| 1560–1450 cm−1 | C–C bond on benzene | extensional vibration |
| 1033 cm−1 | C–O on alcohols, phenols and ethers | extensional vibration |
