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 |