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 g

Answer

The resonance forms of the molecule are shown in the picture

Work Step by Step

The electrons in the lone pair of the oxygen are delocalized. The first resonance form is when the electrons form a double bond between carbon and oxygen, giving oxygen three bonds and a positive charge. The same happens when the electrons are delocalized between the other oxygen and carbon.
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