Functional groups Wave number (cm-1)
C-O stretching 1155 cm-1
1187 cm-1
C=O Stretching 1752 cm-1
N+-H Stretching 2500-2550 cm-1
C-H Stretching 3121 cm-1
O-H Stretching 3300 cm-1
Table 9: IR values for the prominent peaks in the finger print region.