Organic Chemistry (8th Edition)

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

Chapter 16 - Aromatic Compounds - Problems - Page 734: Problem 16-19 e

Answer

Aromatic

Work Step by Step

It is aromatic because it has 6 pi electrons, 4 pi electrons from the double bonds + 2 electrons from oxygen lone pair. The carbon double bonded to O is $sp^2$. Moreover, if resonance is drawn by pushing or pulling electrons, then it makes a cyclic system with 6 pi electrons.
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