Chapter20: Carboxylic Acids And Nitriles
Section20.SE: Something Extra
Problem 55AP: How would you use NMR (either 13C or 1H) to distinguish between the following pairs of isomers?
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
Transcribed Image Text:Compound 4, Formula
+
Unknown MS: M peak
at 74 C-NMR: There
Z
are (3) signals.
Compound 4, Formula Unknown
MS: M* peak at m/z 74
100
90
80
70
60
50
40
30
20
10
of
4000
mmm
1 H
3500
11-12 ppm
3000
C-NMR: There are (3) signals.
2500
2000 1800 1600 1400 1200 1000 800
2 H
3 H
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