Answer to Question #309675 in Organic Chemistry for Lipika

Question

The most stable conformation of butane is anti conformation and it's least stable conformation is eclipsed conformation. Why?

Answer 1

Because of different steric interactions, the most stable conformer is the anti conformer. The second-most stable conformer is the gauche conformer

The eclipsed conformation is said to suffer torsional strain because of repulsive forces between electron pairs in the C―H bonds of adjacent carbons.