Conformation of Cyclohexane:

Cyclohexane is a six-membered ring hydrocarbon with the formula C6H12. It exists in two possible conformations: Chair and Boat. These conformations interconvert through ring flipping.

Chirality:

Chirality is a property of a molecule that is non-superimposable on its mirror image. A molecule that possesses chirality is said to be chiral, and a molecule that is not chiral is said to be achiral.

Chirality in Cyclohexane:

Among the four possible conformations of cyclohexane, namely Chair, Boat, Twist boat, and Rigid, only the Twist boat conformation is chiral.

Explanation:

- Chair Conformation: The chair conformation of cyclohexane is achiral because it possesses a plane of symmetry, which bisects the molecule into two mirror images.
- Boat Conformation: The boat conformation of cyclohexane is also achiral because it possesses two planes of symmetry, which bisects the molecule into two mirror images.
- Rigid Conformation: The rigid conformation of cyclohexane is achiral because it possesses multiple planes of symmetry.
- Twist Boat Conformation: The twist boat conformation of cyclohexane is chiral because it does not possess any plane of symmetry. It has two non-identical axial bonds and two non-identical equatorial bonds, which makes it non-superimposable on its mirror image, thus chiral.

Conclusion:

The chirality of a molecule depends on the presence or absence of a plane of symmetry. Among the four possible conformations of cyclohexane, only the Twist boat conformation is chiral because it does not possess any plane of symmetry.