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IR Specturm
frequencies for functional groups in the IR spectrum
11
Organic Chemistry
Undergraduate 2
02/05/2013
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Term
SP3 C-H bond
 Definition
2800-3000 cm^-1
Term
SP2 C-H bond
 Definition
3000-3100 cm^-1
Term
SP1 C-H bond
 Definition
3300 cm^-1 (sharp)
Term
C=C DOUBLE BOND
 Definition
1640-1680 cm^-1
Term
Alkyne (terminal)
 Definition
2100 cm^-1 (very small)
Term
-OH group
 Definition
3300 cm^-1, broad
Term
Primary amine (N-H)
 Definition
3300 cm^-1, one sharp spike
Term
Secondary amine (N-H)
 Definition
3300 cm^-1, two sharp spikes
Term
C=O
 Definition
1710-1725 cm^-1, very strong
Term
Carboxylic Acid
 Definition
-OH & C-H stretch overlap, 3000 cm^-1, broad
Term
nitrile (C triple bond N)
 Definition
just above 2200 cm^-1 SHARP
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