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In which case is the indicated unshared pair of electrons not a contributor to the n aromatic system? :Z-I

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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In which case is the
indicated unshared pair of
electrons not a contributor
to the m aromatic system?
+
:0-I

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