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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Question
How many 1H NMR signals does each compound give?
![a.
b.
C.
d.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcf5f01e2-1751-42ed-9709-c6dcbd4984ea%2Fc6b2cec5-ac35-49fa-a421-a31cc24f219b%2Fvlpwf39.png&w=3840&q=75)
Transcribed Image Text:a.
b.
C.
d.
Expert Solution
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Step 1
The 1H signals can be calculated by observing the different sets of hydrogen atoms in a compound.
The best method is to pass a plane which divides the compound into 2 equal halves. The half part would help in depicting the sets in a molecule.
- The plane of symmetry can be seen and it passes through the olefinic carbons. Thus, the compound has 3 sets of different hydrogens as shown,
Step 2
- The molecule has no POS thereby all hydrogens are different. It contains 4 different sets of hydrogen and has 4 signals. The 2 methyl groups are equivalent and hence, the 6 equivalent hydrogens will have the same signal.
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