IR Spectroscopy Practice

C-H sp3

2800-3000 cm-1

C-H sp2

3000-3100 cm-1

C-H sp

3300 cm-1

C-C Alkene

1620-1680 cm-1

C-C Alkyne

2100-2260 cm-1

C-O Carbonyl

1670-1820 cm-1

O-H Alcohol

3200-3600

N-H Amine

3300-3500

C-N Nitrile

2210-2260

N-O Nitro

1515-1560, 1345-1385

Carboxylic Acid IR

3300-2500cm (for OH) and carbonyl stratch at 1700cm

Ketone IR

1715

Aldehyde IR

1720-1740 (for carbonyl) and 2720-2850 for C-H

(1) C-H (Alkane)

(1) =C-H (2) C-H (Alkene)

(1) triple bond C-H

(2) C-H

(3) Carbon triple bond C (Alkyne)

(1) O-H

(2) C-H

(3) C-O (alcohol)

(1) C-H

(2) C=O (ketone)

(1) C-H

(2) C-H aldehydes

(3) C=O (aldehyde)

(1) O-H

(2) C=O (carboxylic acid)

(1) C-H

(2) C=O

(3) C-O (ester)

(1) N-H primary amine

(1) N-H secondary amine