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Question 4.58: Why is the steric strain caused by the tert-butyl group so d......

Why is the steric strain caused by the tert-butyl group so different from those of methyl, ethyl, and isopropyl groups?

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In any conformation of the tert-butyl compound, there is a methyl group located over the cyclohexane ring and there is severe steric repulsion between it and the axial hydrogen atoms at C-3 and C-5.

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