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| compounds | assignment | wavenumber (cm–1) | Tmax (°C) |
|---|---|---|---|
| H2O | O–H stretching | 3735 | 345/434 |
| CO2 | C=O stretching | 2315 | 345/674 |
| CO | C–O stretching | 2182 | 343 |
| acid | C–O stretching | 1170 | 293/347 |
| carbonyl compounds | C=O stretching | 1743 | 348/440 |
| phenol | O–H bending | 1364 | 346/434 |
| aromatic ring | C=C stretching | 1509 | 346/438 |
