Function Group IR ranges Flashcards
1
Q
-OH
A
3250 (broad and strong)
2
Q
-NH
A
3250 (broad, strong–> less so than OH)
Double peak with NH2
3
Q
-OH in carboxylic acid
A
3250 (broad, strong)
4
Q
Alkynes (SP CC-H)
A
3260-3330 (sharp)
5
Q
Alkenes (SP2 C=C-H)
A
3050-3150
6
Q
Aromatic (Benzene-H)
A
~3030
7
Q
Alkane (SP3 C-C-H)
A
2850-3000
8
Q
Aldehyde (O=C-H)
A
2750-2850
9
Q
Alkyne (CC)
A
2100-2260
10
Q
Nitrile (CN)
A
2220-2260
11
Q
Carbonyl (general C=O)
A
1650-2000
12
Q
O=C in carboxylic acid
A
1715
13
Q
O=C within an ester (O=COR)
A
1745
14
Q
O=C within an aldehyde (O=CH)
A
1715
15
Q
O=C in a ketone (O=CR)
A
1715
16
Q
O=C in an amide (O=CNR)
A
1685
17
Q
O=C in cyclohexane
A
1715
18
Q
Alkene (generic C=C)
A
1620-1680
19
Q
C-O
A
1000-1260
20
Q
C-N
A
1030-1230
21
Q
C-Cl
A
600-800
22
Q
C-Br
A
500-600
23
Q
O=C in cyclopentane
A
1745
24
Q
O=C in cyclobutane
A
1775
25
O=C in cyclopropane
1815
