Draw the alternative chair conformations for the cis and trans isomers of 1,2-dimethylcyclohexane, 1,3- dimethylcyclohexane, and 1,4-dimethylcyclohexane. (a ) Indicate by a label whether each methyl group is axial or equatorial. (b) For which isomer(s) are the alternative chair conformations of equal stability? (c) For which isomer(s) is one chair conformation more stable than the other?

Draw the alternative chair conformations for the cis and trans isomers of 1,2-dimethylcyclohexane, 1,3- dimethylcyclohexane, and 1,4-dimethylcyclohexane. (a ) Indicate by a label whether each methyl group is axial or equatorial. (b) For which isomer(s) are the alternative chair conformations of equal stability? (c) For which isomer(s) is one chair conformation more stable than the other?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Alkanes and Cycloalkanes

Alkanes are saturated organic compounds which are made up of C and H atoms. Alkanes have the general formula of CnH2n+2. Alkane contains sp3 hybridized carbon atoms with four sigmas (σ) bonds & every hydrogen atom is connected with one of the carbon atoms. The size of the alkane could be determined by the number of carbon atoms located in it.

Question

Draw the alternative chair conformations for the cis and
trans isomers of 1,2-dimethylcyclohexane, 1,3-
dimethylcyclohexane, and 1,4-dimethylcyclohexane. (a
) Indicate by a label whether each methyl group is axial
or equatorial. (b) For which isomer(s) are the alternative
chair conformations of equal stability? (c) For which
isomer(s) is one chair conformation more stable than
the other?

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Step 1: Chair conformations of cyclohexane

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Step 2: Cis and trans 1,2-dimethylcyclohexane

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Step 3: Cis and trans 1,3-dimethylcyclohexane

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Step 4: Cis and trans 1,4-dimethylcyclohexane

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Step 5: Stability of the isomers

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