IR functional group frequencies Flashcards
1
Q
alkane
(C-H) stretch
A
long peak @ 3000-2850 cm^-1
shorter peak @ ~1500
2
Q
alkene
sp2 (C-H) stretch
A
3100-3000 cm^-1
3
Q
aromatic
(C-H) stretch
A
3150-3050 cm^-1
4
Q
alkyne
(C-H) stretch
A
~3300 cm^-1
5
Q
nitrite or cyano or cyanides
(C (triple bond) N) stretch
A
2260-2240 cm^-1
6
Q
alcohol
O-H stretch for alcohols
A
3500-3200 cm^-1
7
Q
alcohol
O-H stretch for carboxylic acids
A
3400-2400 cm^-1
8
Q
aldehyde
C=O stretch
A
1740-1720 cm^-1
9
Q
ketone
C=O stretch
A
1725-1705 cm^-1
10
Q
carboxylic acids
C=O stretch
A
1725-1700 cm^-1
11
Q
ester
O-H stretch
A
1750-1735 cm^-1
12
Q
ester
C-O stretch
A
1320-1000 cm^-1
13
Q
amine
N-H stretch
A
3500-3100 cm^-1
