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CHEMISTRY |
@CSU
Stanislaus |
CHARACTERISTIC PROTON CHEMICAL SHIFTS
| Type of Proton |
Structure |
Chemical Shift, ppm |
| Cyclopropane |
C3H6 |
0.2 |
| Primary |
R-CH3 |
0.9 |
| Secondary |
R2-CH2 |
1.3 |
| Tertiary |
R3-C-H |
1.5 |
| Vinylic |
C=C-H |
4.6-5.9 |
| Acetylenic |
triple bond,CC-H |
2-3 |
| Aromatic |
Ar-H |
6-8.5 |
| Benzylic |
Ar-C-H |
2.2-3 |
| Allylic |
C=C-CH3 |
1.7 |
| Fluorides |
H-C-F |
4-4.5 |
| Chlorides |
H-C-Cl |
3-4 |
| Bromides |
H-C-Br |
2.5-4 |
| Iodides |
H-C-I |
2-4 |
| Alcohols |
H-C-OH |
3.4-4 |
| Ethers |
H-C-OR |
3.3-4 |
| Esters |
RCOO-C-H |
3.7-4.1 |
| Esters |
H-C-COOR |
2-2.2 |
| Acids |
H-C-COOH |
2-2.6 |
| Carbonyl Compounds |
H-C-C=O |
2-2.7 |
| Aldehydic |
R-(H-)C=O |
9-10 |
| Hydroxylic |
R-C-OH |
1-5.5 |
| Phenolic |
Ar-OH |
4-12 |
| Enolic |
C=C-OH |
15-17 |
| Carboxylic |
RCOOH |
10.5-12 |
| Amino |
RNH2 |
1-5 |
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