NMR and IR Spectral Correlation Tables
Be sure to read the additional notes and see the chart of chemical shifts below.
Infrared
|
1H
NMR
|
||
sp3 C-H | 2850 - 3000, AND 1350 - 1475 | Si(CH4)4 | 0.0 |
sp2 C-H | 3010 - 3100 | RCH3 | 0.8 - 1.1 |
sp C-H | 3300 | R-CH2-R | 1.1 - 1.6 |
aldehyde H-CO | 2750 | R3-CH | 1.5 - 2.0 |
O-H | 3200 - 3600, AND 1590 – 1620(w) | C=C-CHx | 1.8 - 2.2 |
RCOO-H | 2500 – 3200 AND1510 – 1655 (w) | CHx-C=O | 2.0 - 2.4 |
N-H | 3200 - 3500 | Ar-CHx | 2.1 - 2.8 |
C≡C | 2100 - 2260 | C≡C-H | 2.5 |
C≡N | 2220 - 2260 | CHx-CN | 2.4-3.0 |
C=C | 1600 - 1680 | R-CH2-N | 2.5 - 3.5 |
C=C (aromatic) | 1500 - 1600 | Epoxide | 2.5 - 3.5 |
C=O | 1650 - 1800 | R-CHx-X, X=Cl, Br, I | 2.5 - 4.0 |
C-O | 1000 - 1250 | OCHx | 3.2 - 4.5 |
Epoxide | 1050 - 1150 | C=C-H | 4.6 - 7.0 |
C-N | 1020 - 1220 | Aromatic | 6.8 - 8.5 |
C-Cl | 550 - 850 | R-NH2, R-OH | 2.0 - 7+ |
C-Br | 515 - 690 | H-C=O | 9 - 10 |
R-COOH | 10 - 13 |
Additional notes:
- Alcohol, Acid, and Amine hydrogens are usually a bit broader than normal peaks and rarely show splitting.
- A sharp singlet at 0.0 or 7.25d (often small) are due to Tetramethylsilane intenrnal standard or the chloroform solvent. You can ignore them.