The most stable conformation of butane is:

Question

Quizplus · Accepted Answer

The most stable conformation of butane is the anti-conformation, where the methyl groups are as far apart as possible, leading to minimal steric hindrance. In this conformation, both the methyl groups are in equatorial positions and the hydrogen atoms are in axial positions. Choice III depicts this conformation accurately. The other choices either show gauche interactions or both methyl groups in axial positions, leading to higher-energy conformations.

The Most Stable Conformation of Butane Is