CHEM 2323/CHEM 2325 Infrared Spectroscopy

Purpose of IR Spectroscopy

Identifying functional groups of an organic compound

600-1400 cm-1

Fingerprint region; functional groups: C-C, C-N, C-O, C-X

1600-1800 cm-1

Functional groups: C=C, C=O, C=N

2100-2300 cm-1

Functional groups: C≡C, C≡N

2300-3500 cm-1

Functional groups: C-H, N-H, O-H

IR spectrum of an alcohol

IR spectrum of a ketone

IR spectrum of an aldehyde

IR spectrum of a carboxylic acid

IR spectrum of an ester

IR spectrum of a primary amine

IR spectrum of a secondary amine

IR spectrum of a tertiary amine

IR spectrum of monosubstituted benzene

IR spectrum of a terminal alkyne

IR spectrum of an internal alkyne

IR spectrum of a nitrile

Unsaturation number