Characteristics IR Frequency for Common FGs Flashcards
1
Q
Alcohols (R-O-H)
A
-3400
-O-H Stretching
2
Q
Carboxylic Acids (R-C=O-O-H)
A
-2500 to 3300 (br)
-O-H Stretching
3
Q
Amines (R-N-H)
A
-3300
-N-H Stretching
4
Q
Alkynes (Tripple Bond: ≡C-H)
A
-3300
C-H Stretching
5
Q
Alkenes (Double Bonds: =C-H)
A
-3100
C-H Stretching
6
Q
Alkanes (Single bonds: -C-H)
A
-2900
C-H Stretching
7
Q
Alkynes (C≡C)
A
-2200
C≡C Stretching
8
Q
Nitriles (R-C≡N)
A
-2240
C≡N Stretching
9
Q
Aldehydes(R-C=O-H)
A
-1700
C=O Stretching
10
Q
Ketones (R1-C=O-R2)
A
-1700
C=O Stretching
11
Q
Esters (R1-C=O-O-R2
A
-1700
C=O Stretching
12
Q
Carboxylic Acids (R-C=O-O-H)
A
-1700
C=O Stretching
13
Q
Alkenes & Aromatic cpds (\C=C/)
A
-1600-1640
C=C Stretching
14
Q
Alcohols (R1-R2-R3-C-O-H)
A
-1100
-C-O Stretching
