| Compound |
Type ofHydrogen
|
d Valuein ppm
|
Coupling & J value
|
| Alkanes |
R-CH3 |
0.75-1.3 |
3J = 7-8 Hz |
| |
R-CH2-R |
1.2-1.5 |
3J = 7-8 Hz |
| |
R3-CH |
1.5-2.0 |
3J = 7-8 Hz |
| Alkenes |
HC=C-H (trans) |
4.5-6.5 |
3J = 11-18 Hz |
| |
HC=C-H (Cis) |
4.5-6.5 |
3J = 6-15 Hz |
| |
HC=C-C-H |
1.6-2.5 |
4J = 0-3 Hz |
| |
HC=CH2 (gem) |
4.5-6.5 |
2J= 0-3 Hz |
| Alkynes |
C≡CH |
1.7-2.7 |
- - |
| |
HC≡C-CH |
1.6-2.5 |
4J = 2-3 Hz |
| Aromatic |
Ortho'H' Coupling |
6-8 |
3J = 7-10 Hz |
| |
Meta 'H' Coupling |
6-8 |
4J = 2-3 Hz |
| |
Para 'H' Coupling |
6-8 |
5J = 0-1 Hz |
| Aldehydes |
R-C(=O)-H |
9-10 |
- - |
| |
αCH-C(=O)-H |
2-2.5 |
3J = 1-3 Hz |
| Ketones |
-C(=O)-CH |
2-2.5 |
- - |
| Carboxylic acids |
C(=O)-OH |
11-12 |
- - |
| |
HOOC-CHα |
2-2.5 |
- - |
| Esters |
-CO-O-CHα |
3.5-5 |
- - |
| |
CHα-CO-O- |
2-2.5 |
- - |
| Amides |
-CO-NH-CH |
2-3 |
3J = 0-7 Hz |
| |
CH-CO-N- |
2-2.5 |
- - |
| |
-CO-NH |
5-9 |
1J = 50 Hz |
| Amines |
-N-CH |
2-3 |
- - |
| |
-C-NH |
0.5-5 |
1J = 50 Hz |
| |
Ar-NH |
3-5 |
1J = 50 Hz |
| Halogens |
HC- I |
2.4 |
- - |
| |
HC-Br |
2.7-4.1 |
- - |
| |
HC-Cl |
3-4.1 |
- - |
| |
HC-F |
4.2-5 |
2J = 50 Hz |
| |
HC-C-F |
4.2-5 |
3J = 20 Hz |
|
