1
Q
3700-3500 sharp
3200-3600 broad (H-bonded)
A
Phenols & Alcohols
2
Q
2800-3600 very broad
A
Acids
3
Q
3300-3500, 2 bands
A
Amines & Amides - primary
4
Q
3300-3500, 1 band
A
Amines & Amides - secondary
5
Q
3200-3300
A
Alkyne
C≡C—H
6
Q
3000-3200
A
Alkene
C=C—H
7
Q
2900-3000
A
Alkane
C—C—H
8
Q
2700-2800
A
Aldehyde
9
Q
2100 (weak or absent if highly symmetrical)
A
Acetylenes
C≡C
10
Q
2200
A
Nitriles
C≡N
11
Q
2350
A
Carbon dioxide
O=C=O
12
Q
1600-1670 weak unless conjugated
A
Alkenes
C=C
13
Q
1600-1700
A
Imines
C=N
14
Q
1350 and 1550
A
Nitro
—NO2
15
Q
1800-1840, 2 bands
A
Anhydrides (carbonyl group)
16
Q
1800
A
Acid Chlorides (carbonyl group)
17
Q
1725-1750
A
Esters (carbonyl group)
18
Q
1710
A
Acids (carbonyl group)
19
Q
1650
A
Amides (carbonyl group)
20
Q
1725
A
Aldehydes (carbonyl group)
21
Q
1550-1610 and 1400
A
Carboxylate (carbonyl group)
22
Q
1710 and 1715
A
Ketones
O Chem
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