Spectroscopy

3600-3300 cm-1

OH, NH

3300 cm-1

CH (sp)

3100 cm-1

CH (sp2)

2900 cm-1

CH (sp3)

2900-2800 cm-1

Aldehyde

2200-2000 cm-1

Nitrile, terminal alkyne, internal alkyne

1800-1600 cm-1

Carbonyl

1600-1400 cm-1

Alkenes, aromatic hydrocarbons

1100 cm-1

C-O

1-1.5

Alkyl

1.8-2.5

Alpha to carbonyl, allylic

3-4.5

CH-X (X=EWG)

4-6

C=CH (Vinyl)

7-8.2

Aromatic

8.5-9.4

Aldehyde

9.6-10.4

Carboxylic acid

Degree of unsaturation

(2n+2-m)/2

Degree of unsaturation greater than or equal to 4

Benzene ring

#H

Number of H that fit that splitting pattern

Split #

n+1 (n=neighboring Hs)

Singlet

No neighbors

Doublet

One neighbor

Triplet

Two neighbors

Quartet

Three neighbors

(3H, t), (2H, q)

Ethyl group

(9H, s)

Tert-butyl group

(2H, s)

CH2

(1H, s)

OH, ROH, RCOOH

(1H, sept), (6H, d)

Isopropyl group

2 (2H, d), slanted

1,4-disubstituted benzene

Singlet, doublet, triplet/quartet, doublet

1,3-disubstituted benzene

Doublet, triplet/quartet, triplet/quartet, doublet (Messlet)

1,2-disubstituted benzene