IR Spectroscopy Ranges

Alcohols (O-H)

3400-3650 (broad, strong)

Amines (N-H)

3250-3500 (broad, strong) (NH2 doubled)

Acids (COO-H)

2500-3100 (broad, strong)

Alkynes (CC-H)

3260-3330 (sharp)

Alkenes (=C-H)

3050-3150

Aromatics (Benzene-H)

~3030

Alkanes (C-H)

2850-3000

Aldehydes (O=C-H)

2850 and 2750

Alkynes (CC)

2100-2260

Nitriles (CN)

2220-2260

Carbonyls (generic) (C=O)

1650-1850 (strong)

Carboxylic Acid (O=COH)

1710-1760

Ester (O=COR)

1735-1750

Aldehyde (O=CH)

1690-1750

Ketone (O=CR)

1690-1750

Amide (O=CNR2)

1650-1690

Alkenes (generic) (C=C)

1620-1680

Oxygen (C-O)

1000-1260

Nitrogen (C-N)

1030-1230

Chlorine (C-Cl)

600-800

Bromine (C-Br)

500-600

X-H region

4000 to 2700

Triple Bond Region

2300 to 2150

Single Bond Region/Fingerprint Region 

1500 to 500

Double Bond Region

1820 to 1550