IR Spectra groups

CHM 256

3000-2850 (s)

Alkane C-H stretch

1450 & 1375 (m)

Alkane CH3 C-H stretch

1465 (m)

Alkane CH2 C-H stretch

3100-3000 (m)

Alkene C-H stretch

3150-3050 (s)

Aromatic C-H stretch

~3300 (s)

Alkyne (C-H) stretch

1680-1600 (m-w)

Alkene C=C stretch

1600 & 1475 (m-w)

Aromatic C=C stretch

2250-2100 m-w

Alkyne C≡C stretch

1740-1720 (s)

C=O Aldehyde Stretch

1725-1705 (s)

C=O Ketone Stretch

1725-1700 (s)

C=O Carboxylic Acid stretch

1750-1730 (s)

C=O Ester Group Stretch

1670-1640 (s)

C=O Amide stretch

1810&1760 (s)

C=O Anhydride stretch

1800 (s)

C=O acid chloride stretch

1300-1000 (s)

C-O alcohols, ethers, esters, Carboxylic acids, Anhydrides stretch

3500-3200 (m (b))

O-H alcohol stretch

3400-2400 (m (vb))

O-H Carboxylic Acid stretch

3500-3100 (m)

N-H primary and secondary amines and amides stretch

1690-1640 (m)

C=N Imines and Oximes stretch

2260-2240 (m)

C≡N Nitrile stretch

1400-1000 (s)

C-F stretch

800-600 (s)

C-Cl stretch

<667 (s)

C-Br or C-I Stretch