High Frequency to Low Frequency wavelength (um) 5.56 910 1213141516 1-butanol CH(CH3OH -O stretch (unreliable) saturated C-H stretch 4000 3500 3000 2500 200018001600140012001000 800 600 wavenumber(cm) Functional Groups Region Fingerprint Region 4000-1400cm-1 1400-600cm-1 High Frequency to Low Frequency Functional Groups Region 4000 - 1400 cm-1 Fingerprint Region 1400-600 cm-1