Spectroscopy & Spectrometry

5-0.5 ppm

5-0.5 ppm

Alcohol (RO-H)

1.8-0.9 ppm

Alkane (RCH3)

3-1 ppm

Amine (R2N-H)

4.1-3.1 ppm

Alkyl chloride (H-C-Cl)

4.1-2.7 ppm

Alkyl bromide (H-C-Br)

2.6-1.5 ppm

Allylic (H-C-C=C)

3.7-3.3 ppm

Alcohol or ether (H-C-OR)

3.1-1.8 ppm

Terminal alkyne

6.5-4.5 ppm

Vinylic (H-C=C)

2.5-2.0 ppm

C-H adjacent to C=O

2.3-2.1 ppm

C-H adjacent to C-=N

2.8-2.3 ppm

Benzylic (C-H connected to benzene ring)

8-6 ppm

Phenol (ArO-H)

8.5-6.5 ppm

Aryl (Ar-H)

10-9 ppm

Aldehyde (RO=C-H)

13-10 ppm

Carboxylic acid

35-0 ppm

RCH3

40-15 ppm

R2CH2

50-25 ppm

R3CH

40-30 ppm

Quaternary carbons (R4C)

90-65 ppm

Sp hybridized carbons (RC-=CR)

150-100 ppm

Sp2 hybridized carbons (R2C=CR2)

175-110 ppm

Benzene ring

40-20 ppm

Alkyl bromide (RCH2Br)

50-25 ppm

Alkyl chloride (RCH2Cl)

50-35 ppm

Amine (RCH2NH2)

65-50 ppm

Alcohol or ester

125-110 ppm

Cyanide (RC-=N)

185-160 ppm

Aldehyde and carboxylic acid

220-190 ppm

Carbonyl (C=O)

1500-500 cm-1

Fingerprint region: CC, CN and CO single-bond stretching and bending; CH bending

1850-1620 cm-1

CC, CN, and CO double-bond stretching

2300-2100 cm-1

CC and CN triple-bond stretching

3600-2850 cm-1

OH, NH and CH single-bond stretching

15

CH3

29

ethane

43

propane

78

benzene ring

16

Oxygen molecular weight

80

Bromine molecular weight

35

Chlorine molecular weight

3600 cm-1

OH

1350, 1500 cm-1

NO2

14

Nitrogen molecular weight

Benzenecarbaldehyde

Benzaldehyde

Benzenecarboxylic acid

Benzoic acid

Vinylbenzene

Styrene

Methyl phenyl ketone

Acetophenone

Benzenol

Phenol

Methoxybenzene

Anisole

Benzamine

Aniline