IR Spectra Functional Group Identification Flashcards
Name this functional group and its infrared absorbances
Alkene
=C-H: 3020-3100 zone 2, Sp2 hybridized
C=C: 1640-1680 zone 5
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Alkynes
≡C-H: 3300 zone 1
C≡C: 2100-2260 zone 3
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Alkyl Halide
C-Cl: 600-800 fingerprint zone
C-Br: 500-600 fingerprint zone
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Alcohol
O-H: 3400-3650 zone 1
C-O: 1050-1150 fingerprint zone
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Ether
C-O: 1000-1250 (fingerprint zone)
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Nitro
NO2: 1540 zone 5
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Aldehyde (carbonyl famly)
Non-conjugated C=O: 1730 zone 4
Conjugated C=O: 1705 zone 4
C-H: 2750 zone 3
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Ketone (carbonyl family)
Non-conjugated C=O: 1715 zone 4
Conjugated C=O: 1690 zone 4
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Carboxylic Acid
C=O: 1710 zone 4
O-H: 2500-3100 zone 1
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Ester
C=O: 1735 zone 4
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Amine
N-H: 3300-3500 zone 1
C-N: 1030-1230 fingerprint zone
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Amide
C=O: 1690 zone 4
C-N: 1030-1230 fingerprint zone
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Nitrile (cyano)
C≡N: 2210-2260 zone 3
Carboxylic Acid Chloride
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Arene (benzene)
C-H 3030 zone 2, sp2 hybridized
C=C 1660-2000 and 1450-1600 zone 4
Name this functional group and its infrared absorbances
C-H 2850-2960 zone 2
C-C 800-1300 fingerprint zone
