How many unique 1H NMR and 13C NMR signals exist for each compound? How many unique...

Question

Question

How many unique ¹H NMR and ¹³C NMR signals exist for each compound?

How many unique 1H NMR and 13C NMR signals exist f

Answer 1

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Answer #1

Concepts and reason

The concept is to identify the number of signals for the given compounds in $^{\rm{1}}{\rm{HNMR}}\;{\rm{and}}{\;^{{\rm{13}}}}{\rm{CNMR}}$ spectrums.

Fundamentals

Number of non-equivalent hydrogens or carbons is equal to number of signals.

.CH3
Н2
C
Н2
Нас
Нас
CHз
с
Н2
с
Н2
CH3
heptan-4-one
3-methylbutan-2-one
3 non-equivalent hydrogens
3 non-equivalent hydroge

.CНз
Н2
C
Н2
Нас
CHз
с
Н2
Нас
CHз
Н2
heptan-4-one
3-methylbutan-2-one
4 non-equivalent carbons
4 non-equivalent carbons
.CH3

Ans:

Thus, the correct choice of reagents is,

3
2
3
HNMR signals
3
4
3
13CNMR signals
4
4
st
C

Answer 2

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