Wavenumbers

O-H stretch

Strong, broad

3200-3400 cm-1

O-H stretch (Carboxylic acid)

Very broad

2400-2400 cm-1

N-H stretch

Weak, sharp

3100-3500 cm-1

C-H Alkyne stretch

medium-strong, sharp

3300cm-1

alkene/arene C-H stretch

3000-3150 cm-1

alkyl C-H stretches

2850-3000 cm-1

C-H stretches

weak-medium, sharp

22850-3150 cm-1

C-H stretch (aldehyde)

weak, sharp

2750 cm-1

C =- C stretch (alkyne)

2100-2300 cm-1

C=-N (nitrile)

weak-medium, sharp

2200-2300 cm-1

C=O stretch (amide)

Strong, broad

1600-1670 cm-1

C=O stretch

strong, broad

1650-1800 cm-1

Weak characteristics vibrational overtones for aromatic signals (3-4 signals)

1665-2000 cm-1

Fingerprint region:

C-O

C-C

C-N

400-1400 cm-1

Aromatic C-H bends

650-900 cm-1

monosub

700-750 & 690-710 cm-1

ortho-sub

750 cm-1

meta-sub

750-800 & 860-900 cm-1

para-sub

900-860 cm-1