CH1012
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8
IR TABLES II
Carbonyl Absorptions n (cm-1)
Acid chloride ~ 1790
Esters ~ 1740
Aldehydes ~ 1720
Ketones ~ 1710
Acids ~ 1700
 Amides ~ 1650
• Fingerprint region ~ 1500 - 600
Absorptions due to whole (or large parts of) of the molecule.
Provides a “fingerprint” for a cmpd. but cannot be assigned to particular functional groups.      (except C-O ~ 1250 - 1050 cm-1)