Organic Chemistry (8th Edition)

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

Chapter 1 - Introduction and Review - Study Problems - Page 39: 1-41 d

Answer

The first one is more stable.

Work Step by Step

The first one is more stable because it has two resonance forms. The resonance allows the delocalization of electrons between the C-C-C bonds and the distribution of positive charge, which gives it more stability.
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