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
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
Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter13: Nuclear Magnetic Resonance Spectroscopy
Section: Chapter Questions
Problem 13.26P: Ascaridole is a natural product that has been used to treat intestinal worms. Explain why the two...
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