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 1-8 a

Answer

The resonance forms are shown in the picture. The first one is the major contributor.

Work Step by Step

Since the first two resonance forms have their octets full, they are contributors of the resonance. The first one is the major contributor because the electronegative nitrogen atom bears the negative charge.
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