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 h

Answer

Nonaromatic (if pairs on the oxygen not included), antiaromatic (if pairs on the oxygen are included)

Work Step by Step

It would be non aromatic (if pairs on the oxygen not included) because then there is an element in the ring that is $sp^3$. It would be anti aromatic (if pairs on the oxygen are included) because then there would be 8 pi electrons which is 4n and not Huckel number.
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