Organic Chemistry (8th Edition)

Published by Pearson
ISBN 10: 0321768418
ISBN 13: 978-0-32176-841-4

Chapter 1 - Introduction and Review - Problems - Page 17: Problem 1-7 d

Answer

The resonance forms of the molecule are shown in the picture.

Work Step by Step

The electron that form the second bond between the Carbon 1 and carbon 2 are delocalized over all the carbons. This gives a more stable structure than if the double bond existed only between carbon 1 and carbon 2.
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