Wavenumber (cm-1) Wavenumber (cm-1) Wavenumber (cm-1) Main Vibration
Experiment Simulation Functional Group
3345-3350 3600-3700 Secondary oxidation products such as hydroperoxides and alcohols Stretching vibration of O‒H bonds
3000-3010 3000-3006 Cis-double bonds Symmetric stretching vibration of the C‒H bonds in the cis-double bonds
2920-2925 2910-2970 Aliphatic CH3 group Symmetric stretching vibration of the C‒H bonds in the aliphatic CH3 group
2850-2855 2850-2890 Aliphatic CH2 group Asymmetric stretching vibration of the C‒H bonds in the aliphatic CH2 group
1720-1744 1730-1750 Carbonyl compounds such as esters, aldehydes, and others Stretching vibration of C=O bonds
1650-1660 1660-1670 Cis-olefins C=C Stretching vibration of cis-olefins bonds
1460-1470 1450-1470 Aliphatic CH2 and CH3 groups C‒H bending vibration of aliphatic CH2 and CH3 groups
1415-1420 1410-1430 Cis-disubstituted olefins Rocking vibration of Cis-disubstituted olefins
1375-1780 1360-1780 Aliphatic CH2 group C‒H bending vibration of aliphatic CH2 groups
1100-1120 1160-11700 C‒O in ester groups C‒O stretching vibration in ester groups
870-890 840-880 Trans group of disubstituted olefins Bending vibration of trans group of disubstituted olefins
720-725 720-735 Aliphatic CH2 Rocking vibration of overlapping CH2 and out-of-plane bending of cis-disubstituted olefins