IR Spectrum Key Ranges

>3000

O-H, N-H, H-C(sp), H-C(sp2)

~2900

H-C(sp3)

~2200

(C-C triple) (C-N triple)

~1700

(C=O)

~1600

(C=C)

~1500-1600

aromatic

U Shape in exclusively 3000 range

O-H in alcohol

Large U spanning across 3000 “beardy”

O-H in carboxylic acid

Skinny peak around 3300, can have two

N-H, N-H2

Close to 3400, Very Sharp and narrow

C-H (sp)

Around 3050, very sharp

C-H (sp2)