Question

The correct order of the stability of different conformations of cyclohexane is:
(A). chair
(B). boat
(C). twist boat
(D). half chair
Choose the correct answer from the options given below:

• (A) > (B) > (C) > (D)
• (A) > (C) > (B) > (D)
• (A) > (D) > (C) > (B)
• (D) > (C) > (B) > (A)

Hint:

The chair conformation is the most stable because it minimizes both steric and torsional strain, while the half-chair has the highest strain due to poor bond angles and steric clashes.

Answer 1

The Correct Option is B

Cyclohexane conformations exhibit the following stability order:

• Chair conformation (A): Most stable, minimizing steric and torsional strain.
• Twist-boat conformation (C): More stable than the boat conformation due to reduced steric strain.
• Boat conformation (B): Less stable due to flagpole interactions, resulting in steric strain.
• Half-chair conformation (D): Least stable, exhibiting maximum steric and torsional strain.