Organic Chemistry (8th Edition)

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

Chapter 3 - Structure and Stereochemistry of Alkanes - Problems - Page 121: Problem 3-25 a

Answer

Both $cis$ conformers have the equal energy. The structures are shown in the attached image.

Work Step by Step

Both $cis$ conformers have one $CH_3$ group in the axial position and the other $CH_3$ group in equatorial position, so they have equal energy. The structures are shown in the attached image.
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