Functional groups
Wave number (cm
-1
)
C=C (Aromatic)
1600-1400 cm
-1
C=O (ester)
1750-1730 cm
-1
C=O (carboxylic acid)
1725-1700 cm
-1
C-O (ester/carboxylic acid)
1300-1000 cm
-1
O-H (carboxylic acids)
3300-2500 cm
-1
Table 10:
IR values for the prominent peaks in the finger print region
