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For the structures shown below, state the number of pi electrons present in the molecule. H H H H * H H H Number of pi electrons -6 ماتاد V H Number of pi electrons Is the molecule aromatic according to the Huckel criteria? N H If the molecule were planar, would it be antiaromatic?

For the structures shown below, state the number of pi electrons present in the molecule. H H H H * H H H Number of pi electrons -6 ماتاد V H Number of pi electrons Is the molecule aromatic according to the Huckel criteria? N H If the molecule were planar, would it be antiaromatic?

Organic Chemistry
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
Chapter21: Benzene And The Concept Of Aromaticity
Section: Chapter Questions
Problem 21.16P: Which of the molecules and ions given in Problem 21.15 are aromatic according to the Hckel criteria?...
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For the structures shown below, state the number of pi electrons present in the molecule. H H H H * H H H Number of pi electrons -6 ماتاد V H Number of pi electrons Is the molecule aromatic according to the Huckel criteria? N H If the molecule were planar, would it be antiaromatic?
Transcribed Image Text:For the structures shown below, state the number of pi electrons present in the molecule. H H H H * H H H Number of pi electrons -6 ماتاد V H Number of pi electrons Is the molecule aromatic according to the Huckel criteria? N H If the molecule were planar, would it be antiaromatic?
During electrophilic aromatic substitution, a resonance stabilized cation intermediate is formed, Groups, already present on the benzene ring, that direct ortho/para further stabilize this intermediate by participating in the resonance delocalization of the positive charge. Assume that the following group is present on a benzene ring at position 1 and that you are brominating the ring at positon 4. In the box below draw the structure of the resonance contributor that shows this group actively participating in the charge delocalization, -NH₂ You do not have to consider stereochemistry, You do not have to explicitly draw H-atoms. Do not include lone pairs in your answer. They will not be considered in the grading.
Transcribed Image Text:During electrophilic aromatic substitution, a resonance stabilized cation intermediate is formed, Groups, already present on the benzene ring, that direct ortho/para further stabilize this intermediate by participating in the resonance delocalization of the positive charge. Assume that the following group is present on a benzene ring at position 1 and that you are brominating the ring at positon 4. In the box below draw the structure of the resonance contributor that shows this group actively participating in the charge delocalization, -NH₂ You do not have to consider stereochemistry, You do not have to explicitly draw H-atoms. Do not include lone pairs in your answer. They will not be considered in the grading.
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