5. Look at the structures given below (in 5.1 to 5.3). 'H NMR chemical shifts for selected hydrogens. (H, and/or H3) are shown in the tables provided next to the structures. Write the missing NMR characteristics for each structure in the spaces with question marks. (You do not need to fill any of the cells which do not have a question mark). You do not need to predict the exact chemical shifts; you will get points for any reasonable estimates. OCH3 5.1. НА Splitting pattern Chemical shift HA ? ? H3 88.15 ppm HB NO2 Splitting pattern Chemical shift 5.2 85.81 ppm HA HB ? НА HB H НА 5.3 Splitting pattern Chemical shift HA 82.55 ppm ? H HB
5. Look at the structures given below (in 5.1 to 5.3). 'H NMR chemical shifts for selected hydrogens. (H, and/or H3) are shown in the tables provided next to the structures. Write the missing NMR characteristics for each structure in the spaces with question marks. (You do not need to fill any of the cells which do not have a question mark). You do not need to predict the exact chemical shifts; you will get points for any reasonable estimates. OCH3 5.1. НА Splitting pattern Chemical shift HA ? ? H3 88.15 ppm HB NO2 Splitting pattern Chemical shift 5.2 85.81 ppm HA HB ? НА HB H НА 5.3 Splitting pattern Chemical shift HA 82.55 ppm ? H HB
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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Transcribed Image Text:(18)
Look at the structures given below (in 5.1 to 5.3). 'H NMR chemical shifts for selected hydrogens.
(H, and/or H3) are shown in the tables provided next to the structures.
Write the missing NMR characteristics for each structure in the spaces with question marks.
(You do not need to fill any of the cells which do not have a question mark).
You do not need to predict the exact chemical shifts; you will get points for any reasonable estimates.
5.
OCH3
5.1.
НА
Splitting pattern
Chemical shift
HA
?
88.15 ppm
HB
NO2
Splitting pattern
Chemical shift
5.2
HA
85.81 ppm
H3
?
НА
HB
H
НА
5.3
Splitting pattern
Chemical shift
HA
82.55 ppm
?
H
HB
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