Why do the hydrogens labeled E have a higher chemical shift than the hydrogens labeled F? Aren't the E electrons more shielded, therefore, they should have a lower chemical shift?

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 5.50QE
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Why do the hydrogens labeled E have a higher chemical shift than the hydrogens labeled F? Aren't the E electrons more shielded, therefore, they should have a lower chemical shift?

d
H
H
d
c=c
f
CH3
CH₂CH3
g
Isomer B
d = 84.7 (singlet, 2H)
e = 82.0 (quartet, 2H)
f= 81.7 (singlet, 3H)
g= 81.0 (triplet, 3H)
Transcribed Image Text:d H H d c=c f CH3 CH₂CH3 g Isomer B d = 84.7 (singlet, 2H) e = 82.0 (quartet, 2H) f= 81.7 (singlet, 3H) g= 81.0 (triplet, 3H)
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