IR Spectroscopy Flashcards
(21 cards)
1
Q
C-C
A
1200
2
Q
C=C
A
1660
3
Q
C…C
A
<2200
4
Q
Isolated C=C
A
1640 - 1680
5
Q
Conjugated C=C
A
1620 - 1640
6
Q
Aromatic
A
1660
7
Q
R-C…C-R’
A
Weak or absent
8
Q
R-C…C-H
A
2100 - 2200
9
Q
C-H (sp3)
A
<3000
10
Q
C=H (sp2)
A
> 3000
11
Q
C…H (sp)
A
3300 (sharp)
12
Q
Alcohol O-H
A
3300 (broad)
13
Q
Acid O-H
A
3000 (broad)
14
Q
Amine N - H
A
3300 (broad w/spikes)
One spike - primary (RNH2)
Two spikes - secondary (R2NH)
15
Q
C=O
A
1710
16
Q
Aldehyde RHC=O
A
C=O stretch at 1725, saturated C-H stretch <3000 (2 peaks (2710 and 2810)
17
Q
Carboxylic acid
A
O-H shifted to 3000, overinflated
18
Q
Conjugated C=C for ketones, aldehydes, acids
A
Lower stretching from 1710 to 1685
19
Q
Ester/Ketone with < 6 membered ring
A
1735
20
Q
C=N
A
1660
21
Q
C…N
A
> 2200
