Answered: ignore (solvent) 190 180 170 160 150…

ignore (solvent) 190 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 190.20 159.87 136 49 132.21 128.70 113.85 67SS 28.50 00 Ez

Introductory Chemistry: An Active Learning Approach

6th Edition

ISBN:9781305079250

Author:Mark S. Cracolice, Ed Peters

Publisher:Mark S. Cracolice, Ed Peters

Chapter3: Measurement And Chemical Calculations

Section: Chapter Questions

Problem 5E

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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

100%

2) Answer the following questions based on the 13C NMR Specturm provided:

a)Are there any peaks upfield of 70 ppm seen in the 13 13C NMR spectrum, yes or no? If so list the corresponding ppm values.

b) What is the chemical shift in ppm for the carbonyl (C=O) in the 13C NMR spectrum?

ignore (solvent)
190
180
170
160
150
140
130
120
110
100
90
80
70
60 50 40
30
20
ppm
190.20
159.87
136 49
134.29
132.21
128.70
113.85
55.29
28.50
00'7

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