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126 |
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Reasoning:
Arguments against strukture b):
- COOH-signal missing,
- CH2 -doublet missing,
- -CH= should be a multiplet.
Arguments for structure a):
- 5 signals,
-
| -OCH3 |
d= 3,6 ppm (Singulett) |
| -CH=CH- |
d = 6,3 ppm (Dublett)
d =7,2 ppm (Dublett)
|
 |
d = 7,1 ppm (Dublett)
d = 8,3 ppm (Dublett) |
This was an example to make an decision using the existence or the lack
of coupled multiplets.
On to the next problem!
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