Organic Chemistry Signals

A mix of Spectroscopy, H NMR and C NMR singals

monosub aromatic bond

700-750 cm-1 & 690-710 cm-1

ortho-sub

750 cm-1

meta-sub

750-800 cm-1 & 860-900 cm-1

para-sub

800-860 cm-1

vibrational aromatic overtones

1665-2000 cm-1, weak, 3-4 signals

C=O

1650-1850 cm-1, strong, broad

amide C=O

1600-1670 cm-1, strong broad

alkyne C≡C

2100-2260 cm-1, weak-medium, sharp

nitrile C≡N stretch

2200-2260 cm-1, weak-medium, sharp

aldehyde C-H stretch

2750 cm-1, weak, sharp

C(sp3)-H

2850-3000 cm-1, weak medium, sharp

C(sp2)-H

3150-3000 cm-1, weak medium, sharp

c(sp)-H

~3300 cm-1, medium-strong, sharp

N-H

3200-3500 cm-1 weak, sharp

alcohol O-H

3200-3550 cm-1 strong, broad

carboxylic acid O-H

2400-3550 cm-1 very broad

1°, 2°, 3°

~0.7-1.7 ppm

C(sp3)-H

0-4 ppm

C(sp)-H

0-4 ppm

C(sp2)-H

4-8.5 ppm

2-3 ppm

2-3 ppm

Ar = aromatic ring

2-3 ppm

2-3 ppm

1-6 ppm

4-6.5 ppm

4.5-7.5 ppm

6-8.5 ppm

8.5-12 ppm

10-12 ppm

8-30 ppm

15-50 ppm

25-60 ppm

20-50 ppm

15-95 ppm

30-40 ppm

70-90 ppm

C(sp3)

0-100 ppm

aryl/alkene C(sp2)

100-150 ppm

C(sp)

100-150 ppm

100-120 ppm

100-150 ppm

120-150 ppm

150-170 ppm

160-180 ppm

165-185 ppm

190-220 ppm