Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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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 o…
Question
  1. Identify peaks in the 1H spectrum that correspond to the t-butyl group, the phenyl groups, and the proton that is α-to the carbonyl.

Peak

Expected

Observed

A: Chemical Shift

6.0-8.5 ppm (aromatic)

7.38 ppm

A: Splitting

Multiplet

Multiplet

A: Integration

5H

5H

B: Chemical Shift

6.0-8.5 ppm (aromatic)

6.85 ppm

B: Splitting

Multiplet

Multiplet

B: Integration

5H

5H

C: Chemical Shift

5.0-9.0 ppm (amide)

6.19 ppm

C: Splitting

Singlet

Singlet

C: Integration

1H

1H

D: Chemical Shift

1.0-5.0 ppm (amino)

5.52 ppm

D: Splitting

Multiplet

Multiplet

D: Integration

1H

1H

E: Chemical Shift

1.4-1.8 (alkyl)

1.33 ppm

E: Splitting

Singlet

Singlet

E: Integration

3H

3H
b=0 H-N "X ester of an a-hydroxy amide
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Transcribed Image Text:b=0 H-N "X ester of an a-hydroxy amide
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Step 1: Definition of peaks in NMR spectroscopy
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