IR Spectroscopy Flashcards by Helene Spiewak

Q

3700-3500 sharp

3200-3600 broad (H-bonded)

A

Phenols & Alcohols

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Q

2800-3600 very broad

A

Acids

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Q

3300-3500, 2 bands

A

Amines & Amides - primary

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Q

3300-3500, 1 band

A

Amines & Amides - secondary

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Q

3200-3300

A

Alkyne
C≡C—H

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Q

3000-3200

A

Alkene
C=C—H

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Q

2900-3000

A

Alkane
C—C—H

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Q

2700-2800

A

Aldehyde

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Q

2100 (weak or absent if highly symmetrical)

A

Acetylenes
C≡C

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Q

2200

A

Nitriles
C≡N

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Q

2350

A

Carbon dioxide
O=C=O

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Q

1600-1670 weak unless conjugated

A

Alkenes
C=C

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Q

1600-1700

A

Imines
C=N

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Q

1350 and 1550

A

Nitro
—NO2

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Q

1800-1840, 2 bands

A

Anhydrides (carbonyl group)

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Q

1800

A

Acid Chlorides (carbonyl group)

Q

1725-1750

A

Esters (carbonyl group)

Q

1710

A

Acids (carbonyl group)

Q

1650

A

Amides (carbonyl group)

Q

1725

A

Aldehydes (carbonyl group)

Q

1550-1610 and 1400

A

Carboxylate (carbonyl group)

Q

1710 and 1715

A

Ketones