Organic Chemistry (8th Edition)

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

Chapter 7 - Structure and Synthesis of Alkenes - Study Problems - Page 323: 7-30 b

Answer

This synthesis is done via dehydrohalogenation of bromocyclohexane obtained in part $(a)$. The mechanism is shown in the attached image.

Work Step by Step

For synthesising cyclohexene, we use the $bromocyclohexane$ formed in part (a), and heat it in the presence of a strong base such as $KOH$ or $KO-t-But$. This is a dehydrohalogenation reaction which leads to the loss of $HBr$ and forms $cyclohexene$.
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