SN | Wave length in cm−1 | Peaks nature of AC | Functional groups | |
---|---|---|---|---|
Before | After treatment | |||
1 | 3300–3600 | Small sharp peak | Diminished small sharp peak | Presence of O–H |
2 | 2944 | Small sharp peak | Small sharp peak | Stretching C–H |
3 | 1500–1600 | Long and broad peak | Diminished small peak | Carboxylate bond |
4 | 1425 | Small peak | Very small peak | C–C stretched (aromatic) |
5 | 800 | Sharp peak | No peak | C=CH stretched |