Which one of these four compounds would give a 13C NMR spectrum with only these three peaks, one at 210, one at 40 and one at 20?H3COBOD13C NMR delta (8) valuesC=O of ketones, aldehydesC=O of acids, esters, amidesC=C and C=NC-X (where X = halogen, O)base position, alkyl COCAOACH3 H3CBCH3H3C1220-200160-180100-15040-700 - 40CH3H₂CDCH3

Only three peaks in 13C spectra indicate there are three types of different electronic environment…

Answered: Which one of these four compounds would…

Which one of these four compounds would give a 13C NMR spectrum with only these three peaks, one at 210, one at 40 and one at 20? H C A CH3 H3C В CH3 H3C C CH3 H3C D CH3

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter15: Benzene And Aromaticity

Section15.SE: Something Extra

Problem 40AP

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Concept explainers

NMR Spectroscopy

NMR stands for Nuclear Magnetic Resonance in which the study of different molecules is done based on the interaction of radiofrequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field. A precise study of spectra of visible light and all bands of electromagnetic radiation is called spectroscopy.

Question

Which one of these four compounds would give a 13C NMR spectrum with only these three peaks, one at 210, one at 40 and one at 20?
H3C
OB
OD
13C NMR delta (8) values
C=O of ketones, aldehydes
C=O of acids, esters, amides
C=C and C=N
C-X (where X = halogen, O)
base position, alkyl C
OC
A
OA
CH3 H3C
B
CH3
H3C1
220-200
160-180
100-150
40-70
0 - 40
CH3
H₂C
D
CH3

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