| 1730 - 1700 | Aliphatic carboxylic acids(C=O) | [12] [44] |
| 1730 - 1650 | Carbonyl stretching (C=O) | [10] |
| 1730 - 1640 | Aldehydes/Ketones C=O | [12] |
| 1728 - 1694 | Carbonyl (C=O) | [46] |
| 1727 - 1720 | Carbonyl (C=O) | [41] |
| 1726 - 1724 | Carbonyl (C=O) | [40] |
| 1726 | Carbonyl (C=O) | [9] |
| 1726 - 1715 | Hydrogen bonding free | [8] |
| 1720 | Carboxyl (C=O) | [5] [7] [28] |
| 1720 - 1714 | Carbonyl (C=O) | [24] |
| 1713 | Carbonyl (C=O) | [47] |
| 1710 | Carbonyl (C=O) | [27] [50] |
| 1710 - 1680 | Aromatic polycarboxylic acids (C=O) | [12] |
| 1706 | C=O in aldehydes and ketones | [55] |
| 1700 | Carbonyl (C=O) | [54] |
| 1690 - 1680 | Hydrogen bonded (O-H) | [8] |
| 1680 - 1665, 1660 - 1630 | Aliphatic hydrocarbons (C=C) | [12] |
| 1680 - 1630 | C=O stretch in amide | [44] |
| 1680 - 1620 | Unsaturated aliphatic (C=C) | [48] |
| 1650 - 1620 | Alkenyl double bond stretch (C=C) | [10] |
| 1650 - 1590 | Amino (C?NH2) | [48] |
| 1644, 1281, 849 | O-N groups | [31] |
| 1640 - 1560 | N-H bend in primary amines | [44] |
| 1640 - 1550 | Primary and secondary amide N-H bend | [44] |
| 1640 - 1550 | C=O stretching in cyclic and acyclic compounds, ketones and quinones | [52] |
| ~1640 | Asymmetric-NO2 stretch | [32] |
| 1631, 1278, 856 | Organonitrates (CONO2) | [29] [37] [38] |
| 1630 - 1620 | Amine (C-NH2) | [24] |
| 1630 | Amines (C-NH2) | [17] |
| 1630 | Organic (NO3) | [28] |
| 1630, 1280 - 1260, 860 | Organonitrates (R-ONO2) | [36] [37] |
| 1630 - 1620, 1280 - 1260, 860 - 855 | Organonitrates | [27] |