Compare the stabilities of the following two compounds (A) and (B): A: cis−1−ethyl−3−methylcyclohexaneB: trans−1−ethyl−3−methylcyclohexane
A
A is more stable
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B
B is more stable
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C
A and B are of equal stability
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D
No comparison can be made
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Solution
The correct option is A A is more stable
A will be more stable because in A CH3 and CH3CH2 groups are in equatorial position, so there will be no hindered interaction. But in B, due to axial −CH3 groups there will be steric interaction with axial H− atoms.