Question

The incorrect statement regarding conformations of ethane is:

• A. Ethane has infinite number of conformations
• B. The dihedral angle in staggered conformation is $60\degree$
• C. Eclipsed conformation is the most stable conformation.
• D. The conformations of ethane are inter convertible to one-another.

Answer 1

Answer: (C)

Eclipsed conformation is the most stable conformation.

Answer 2

Eclipsed conformation is the least stable conformation of ethane due to repulsion between electron clouds of adjacent C-H bonds. The staggered conformation is more stable.
The Correct answer is: Eclipsed conformation is the most stable conformation.