Peaks (cm⁻¹) Groups Peak assignments

3500 - 3200

3000 - 2800

1760 - 1690

1660 - 1633

Alcohols, phenols

Alkanes

Carboxylic acids

Alkenes

O0 O-HStretch, H-bonded

C-H (stretching mode)

C=O stretch

?C=C? stretch