Question

6. Which of the following is true in cyclohexane?
(a) Activation energy barrier for inversion of chair can overcome at room temperatu
(b) Boat can not be converted into chair
(c) There is steric repulsion between axial hydrogen at C, and C3
Yd) Boat is more stable than twist boat.​

Answer 1

Answer:

a one is the correct answer......

Answer 2

Answer:

The activation energy barrier for inversion of the chair can overcome at room temperature. This statement is true for cyclohexane.

Explanation:

• At room temperature, the cyclohexane interconverts rapidly into a mirror chair conformation. This is often referred to as the ring flip. During the ring flip, the axial bonds become equatorial and the equatorial bonds become axial. Due to the ease of bond rotation, the chair-chair flipping can easily take place at room temperature.

• The boat conformation can be converted into a chair conformation. The chair conformation has lower energy than the boat conformation and is the most stable conformation.

• There is no steric repulsion between axial hydrogen at C1 and C3. Steric repulsion happens when there are bulkier groups close to each other.

• The order of stability of conformation of cyclohexane is as follows:

        Chair > Twist boat > Boat > Half chair

• The boat conformation, due to its torsional and Vander Waal's strain possess higher energy than the twist boat conformation. The higher the energy, the lower will be the stability. Thus, the twist boat conformation has higher stability than the boat conformation.