The following figure represents the ring flip of un substituted cyclohexane. Thi

Question

The following figure represents the ring flip of un substituted cyclohexane. This means that all empty circles represent hydrogen's. What happened to the position of the hydrogen labeled with * after the flip? Notice that each hydrogen exchange position as we moved from I to II. Color the axial H labeled with the asterisk and increase the size of the circles. This means that you are substituting hydrogen by a different element (color). Since Hydrogen is the smallest element, any substitution will result in a higher interaction of higher strain energy. Look around the colored substituent for each structure. Which conformer do you to have lower energy or more stability: I or II? Explain.

Explanation / Answer

Structure II will have lower energy and more stable for bulky substituent.

Reason :

Increasing bulkyness in structure I will repelled by two more axial group present in 3rd 5th position which is known as 1,3-diaxial interaction. whereas is structure II does not involve in 1,3-diaxial interaction.

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