×
| Bond type | Frequency(cm-1) |
|---|---|
| C-H alkane | 2950 – 2850 |
| C-H alkene | 3080 – 3020 |
| C-H aldehyde | ~2900 |
| C-H alkyne | ~3300 |
| alkyne triple bond | 2250 – 2100 (s) |
| alkene double bond | 1680 - 1620 (s) |
| carbonyl, ketone | 1725 – 1700 (s) |
| carbonyl, aldehyde | 1740 – 1720 (s) |
| carbonyl, ester | 1750 – 1730 (s) |
| carbonyl, acid | 1725 – 1700 (s) |
| carbonyl, amide | 1690 – 1650 (s) |
| O-H, alcohol | 3600 – 3200 (s, broad) |
| O-H, acid | 3000 – 2500 (s, broad) |
| C-O, alcohol, ester, ether | 1300 - 1000 |
Where,s = strong absorbance
