Functional Group Infrared Absorptions
Functional Group
Absorption Band Position(cm-1)
C-H

2850-2960

=C-H
3020-3100
C=C
1650-1670
XC-H
3300
CXC
2100-2260
C-Cl
600-800
C-Br
500-600
C-I
500
O-H
3400-3640
C-OH
1050-1150
3030
1600,1500
N-H
3310-3500
C-N
1030,1230
C=O
1670-1780
COOH
2500-3100
CXN
2210-2260
NO2
1540