Chapter 12 - Structure Determination: Mass Spectrometry And Infrared Spectroscopy Page 18
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44Regions of the Infrared Spectrum
-1
-1
4000-2500 cm
N-H, C-
2000-1500 cm
double
H, O-H (stretching)
bonds (stretching)
3300-3600 N-H, O-H
C=O 1680-1750
-1
3000 C-H
C=C 1640-1680 cm
-1
-1
2500-2000 cm
CC
Below 1500 cm
and C N (stretching)
“fingerprint” region
18
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