A B (a) Identify which of the structures (A and B) gives to the *H NMR spectrum below. Explain your answer. Assign the proton signals in the H NMR spectrum. Cakulate the coupling constant and draw the tree diagrams. Assign the coupling constants of the peaks at 3.1, 4.5 and 6.4 ppm in the tree diagrams. (There are '1, “J, and 'J coupling in this compound. Be sure to indude all of them in the tree diagrams). (d) (b) (c) HNMR Spectrum 3H 1H 1H 1H (pem)

A B (a) Identify which of the structures (A and B) gives to the *H NMR spectrum below. Explain your answer. Assign the proton signals in the H NMR spectrum. Cakulate the coupling constant and draw the tree diagrams. Assign the coupling constants of the peaks at 3.1, 4.5 and 6.4 ppm in the tree diagrams. (There are '1, “J, and 'J coupling in this compound. Be sure to indude all of them in the tree diagrams). (d) (b) (c) HNMR Spectrum 3H 1H 1H 1H (pem)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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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

(a)
Identify which of the structures (A and B) gives to the H NMR spectrum below. Explain your
answer.
Assign the proton signals in the H NMR spectrum.
(b)
(c)
Calculate the coupling constant and draw the tree diagrams. Assign the coupling constants of
the peaks at 3.1, 4.6 and 6.4 ppm in the tree diagrams. (There are '1, *), and J coupling in this
compound. Be sure to indude all of them in the tree diagrams).
H NMR Spectrum
3H
1H
1H
1H
14
12
44
40
(ppm)

642
(ppm)
(ppm)
(ppm)
OS REI
1381.50
1378.50
OS'SLEI

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