NEET levelSingle correct optionDifficulty 1 of 3st121
On ring flip of the chair conformer of methylcyclohexane that has the methyl group equatorial, the methyl group becomes
Aaxial, and the new chair is more stable
Bequatorial, and the new chair is equally stable
Cequatorial, and the new chair is less stable
Daxial, and the new chair is less stable
Answer: D
Ring flip interconverts axial and equatorial positions. The equatorial methyl becomes axial and suffers two 1,3-diaxial CH3/H interactions (about 7.3 kJ/mol), so the flipped chair is less stable.