IR Signals

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13 Terms

1
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Signal at 1720 cm^-1 conjugated at 1680

C=O

2
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Signal at 1650 conjugated 1600

C=C

3
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Signal at 3,000

CSP3-H

4
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Signal at 3,100 or 3,080

CSP2-H

5
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Signal at 3,300

CSP-H

6
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Signal at 2,200 or 2150

C=—C triple bond

7
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Signal at 3200-3600

OH group broad

8
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Signal at 1650-1550

C=N

9
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signal at 2260-2220

C=—N triple bond

10
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Two stretches 3300 and 3500

RNH2 primary amine

11
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One stretch 3300-3500

RRNH2 secondary amine

12
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none

RRRN tertiary amine

13
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More S character means a stronger bond and a stronger bond is harder to vibrate

SP>SP2>SP3 on bond strength so CSP>CSP2>CSP3 for signals