IR Peaks CHEM231

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Last updated 4:05 PM on 9/24/26
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18 Terms

1
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C-H Stretching

In, around 3000 cm

2
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C-H Intensity

Weak to moderate

3
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Alkene

3100 cm

4
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Alkyne

3300 cm

5
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Benzene

Multiple peaks between 3050 cm and 3150 cm

6
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O-H Intensity

Broad and strong

7
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O-H Peak

Start 3400, end 3700

8
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OH Peak in carboxylic acid

Start below 3000, end above 3000

9
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N-H Peak

3300 to 3500

10
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N-H Intensity

Semi-broad, weak to moderate

11
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Primary Amine

2 peaks around 3300 to 3500

12
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Secondary amine

1 peak around 3300 to 3500

13
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C≡N

Nitrile, 2200

14
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Nitrile Intensity

Very sharp, moderate

15
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C=O Peak

1600 - 1800

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C=O Intensity

Strong and semi-broad

17
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Carboxylic Acid IR

OH stretch and C=O stretch

18
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Amide

N-H stretch and C=O stretch