Table 3 Prominent fundamental vibrations
S. NO | Wavenumber (cm-1) | Compound | Functional groups |
|---|---|---|---|
1 | 3965 | Alcohol | O-H stretching |
Amine | N-H stretching | ||
2 | 3445 | Alcohol | O-H stretching |
Amine and amides | N-H stretching | ||
Carboxylic acid | O-H stretching | ||
3 | 2999 | Alcohol | O-H stretching |
Amine salt | N-H stretching | ||
Alkane | C-H stretching | ||
Carboxylic acid | O-H stretching | ||
4 | 2914 | Alcohol | O-H stretching |
Carboxylic acid | O-H stretching | ||
Alkane | C-H stretching | ||
Amine salt | N-H stretching | ||
5 | 2683 | Alkane | C-H stretching |
Carboxylic acid | O-H stretching | ||
6 | 1661 | Alkene | C = C stretching |
Aromatic compound | C-H bending | ||
Imine/oxime | C = N stretching | ||
Amide | C = C bending | ||
7 | 1437 | Alkane | C-H bending |
Nitro | N = N bending | ||
Carboxylic acid | O-H bending | ||
8 | 1405 | Alkane | C-H bending |
Carboxylic acid | O-H bending | ||
Nitro | N = N bending | ||
Alcohol | O-H bending | ||
Sulfate, Sulfonyl chlorides | S = O stretching | ||
9 | 1312 | Phenol | O-H bending |
Aromatic Amine | C-N stretching | ||
Sulfones, Sulfonyl chlorides, Sulfates, Sulfonamides | S = O stretching | ||
10 | 1040 | Fluoro compound | C-F stretching |
Amine | C-N stretching | ||
Sulfoxide | S = O stretching | ||
Anhydride | CO-O-CO stretching | ||
11 | 1001 | Amine | C-N stretching |
Fluoride | C-F stretching | ||
12 | 947 | Alkene | C = C bending |
13 | 698 | Aromatic compounds | C-H bending |
Alkene | C-H bending | ||
Alkyl halides | C-Cl stretching | ||
14 | 576 | Halo compounds | C-X stretching |