The compound [14]-annulene shows only two 'H NMR signals - one at ~0 ppm and the other ~7.6 ppm. Using benzene as a model for diamagnetic anisotropy, which of the following is expected to be true for the H signals of {14}-annulene as shown to the right? [Note: coding here is Red = outer H's, Blue = inner H's] H. H. HH H. a. The blue are 7.6 ppm and the blue are 0 ppm b. The red are 7.6 ppm and the red are 0 ppm c. Some of the red and some of the blue give rise to each signal d. The inner protons of all annulenes form an H-bonding complex called the diagmagnetic quatro-orbitrap that always shows a signal at -8 ppm. e. More information is needed

Macroscale and Microscale Organic Experiments
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Chapter30: Alkylation Of Mesitylene
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The compound [14]-annulene shows only two 'H NMR signals - one at ~0 ppm and the other ~7.6 ppm. Using benzene as a
model for diamagnetic anisotropy, which of the following is expected to be true for the 'H signals of {14}-annulene as shown
to the right? [Note: coding here is Red = outer H's, Blue = inner H's]
H H'
H H
a. The blue are 7.6 ppm and the blue are 0 ppm
b. The red are 7.6 ppm and the red are 0 ppm
c. Some of the red and some of the blue give rise to each signal
d. The inner protons of all annulenes form an H-bonding complex called the diagmagnetic quatro-orbitrap that always shows a
signal at ~8 ppm.
e. More information is needed
Transcribed Image Text:The compound [14]-annulene shows only two 'H NMR signals - one at ~0 ppm and the other ~7.6 ppm. Using benzene as a model for diamagnetic anisotropy, which of the following is expected to be true for the 'H signals of {14}-annulene as shown to the right? [Note: coding here is Red = outer H's, Blue = inner H's] H H' H H a. The blue are 7.6 ppm and the blue are 0 ppm b. The red are 7.6 ppm and the red are 0 ppm c. Some of the red and some of the blue give rise to each signal d. The inner protons of all annulenes form an H-bonding complex called the diagmagnetic quatro-orbitrap that always shows a signal at ~8 ppm. e. More information is needed
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