Atoms |
mode |
type |
Region (cm-1) |
O-H |
stretch |
free |
3600-3650 |
|
|
H-bonded |
3200-3500 |
N-H |
stretch |
sym |
3100-3500 |
|
|
asym |
|
C-H |
stretch |
alkynes |
3300 |
|
|
aromatics |
3050-3150 |
|
|
alkenes |
3000-3100 |
|
|
alkanes |
2850-3000 |
|
|
aldehydes |
2700-2900 |
C=N |
|
nitriles |
2240-2260 |
C=C |
|
alkynes |
2100-2250 |
X=C=Y |
|
allenes |
1950-2270 |
C=O |
|
anhydride |
1760 & 1810 |
|
|
acid chloride |
1800 |
|
|
ester |
1730-1750 |
|
|
aldehyde |
1720-1740 |
|
|
ketone |
1705-1725 |
|
|
carboxylic acid |
1700-1725 |
|
|
amide |
1640-1670 |
C=N |
|
imine |
1640-1690 |
C=C |
|
alkene |
1600-1680 |
|
|
aromatic |
1475 & 1600 |
O-H |
|
|
|
N-H |
bend |
|
1550-1640 |
C-H |
bend |
-CH2- |
1465 |
|
|
-CH3 |
1375 & 1450 |
C-N |
|
amines |
1000-1350 |
C-O |
|
alcohols |
1000-1300 |
C-H |
out-of-plane bend |
alkenes |
650-1000 |
|
|
aromatics |
690-900 |