Spectroscopic Characterization of Omeprazole and Its Salts

Table 3

Calculated stretching and deformation modes of OMP polar groups.

Group	Frequency (cm^−1)
C-OCH3 (pyridine)	1423, 1181, 1013
C-OCH3	1442, 1060, 988
N=C-C-CH3	1547, 1411, 1250
HN-C-S	3015, 1570, 1411, 1182
N=C-S	1411, 1182
S=O	978, 618, 422, 381