¥Structural unit Frequency, cm-1
¥Stretching vibrations (carbonyl groups)
¥Aldehydes and ketones 1710-1750
¥Carboxylic acids 1700-1725
¥Acid anhydrides 1800-1850 and 1740-1790
¥Esters 1730-1750
¥Amides 1680-1700
Table 13.4 (p 519)
Infrared Absorption Frequencies
C
O