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Need help on these spectroscopy questions Screenshot (69).png

Questions 3-5 use top spectrum questions 6-8 use bottom spectrum

3. What is the expected ratio between the peaks at 122 and 123 and why?

4. What fragment is lost to produce the base peak at 107?

5. After you've solved the structure, describe why the base peak is formed in terms of why it is such a stable cation.

6. Select all of the following that are present in this molecule, given this NMR spectrum. Pick from the choices below. Note that a proton is missing! You should know why that is if you have solved the structure correctly and you remember what was discussed about this type

of compound and its NMR below.

Choice options for question 6: O-H of acid, O-H of alcohol, C-H of aldehyde, Benzene CH, Alkene CH, CH adjacent to O,N,Cl, etc., CH in ally position/benzyl position/adjacent to C=O, t-butyl group, isopropyl group, ethyl group (not part of another chain), methyl group (not part of another chain

7. Draw the structure of the molecule using line structure and label each type of proton with an A,B, or C from the spectrum above.                                                                                                              

8. Sketch a 13C spectrum of your compound. Redraw your structure and put numbers 1,2,3 etc. on the structure and on the 13C spectrum to show which peak corresponds to which carbon or carbons

Screenshot (69).png
I am stuck on this NMR spectroscopy stuff about the compound Cnggo 120 [Ell] m m
c) a Relative Intensity
3 EU 3. What is the expected ratio between the peaks at 122 and 123 and why? 4. What fragment is lost to produce the base peak at 107? such a stable cation. 6. Select all of the following that are present in this molecule, given this NMR spectrum. Pick
from the choices below. Note that a proton is missing! You should know why that is if you have
solved the structure correctly and you remember what was discussed about this type of
compound and its NMR below. Signa s 3.0 1.1 m
at about 2'6 ppm C pp
7.0 ppm B
A 10 8 6 4 2 0 Choice options for question 6: O-H of acid, 0-H of alcohol, C—H of aldehyde, Benzene CH, Alkene
CH, CH adjacent to W], etc., CH in ally position/benzyl position/adjacent to C=O, t—butyl
group, isopropyl group, ethyl group (not part of another chain), methyl group (not part of
another chain 7. Draw the structure of the molecule using line structure and label each type of proton with an
Q, or C from the spectrum above. 8. Sketch a 13C spectrum of your compound. Redraw your structure and put numbers 1,2,3 etc.
on the structure and on the 13C spectrum to show which peak corresponds to which carbon or
carbons

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