IR Spectrum

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Last updated 5:11 AM on 9/30/26
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20 Terms

1
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C=C

1660 cm-1

2
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C triple C

3
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isolated C=C

1640-1680 cm-1

4
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aromatic C=C

~1600 cm-1

5
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sp3 C-H

2800-3000 cm-1

6
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sp2 C-H

3000-3100 cm-1

7
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sp C-H

3300 cm-1

8
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higher S character means what?

higher vibration

9
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O-H

3300, broad round tip

10
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amine types

primary (RNH2), secondary (R2NH), tertiary (R3N)

11
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RNH2 (primary)

two sharp peaks, 3300 cm-1

12
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R2NH (secondary)

one sharp peak, 3300 cm-1

13
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R3N (tertiary)

none

14
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carbonyl in aldehyde

1725, 2700/2800 C-H

15
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carbonyl in COOH

1710, O-H 2900-3500

16
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carbonyl in ketone

1710

17
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ester

1735-1740 cm-1

18
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conjugated carbonyl

19
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non-conjugated carbonyl

>1700 cm-1

20
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C triple N

>2200 cm-1