Twist-boat Conformation
The twist-boat conformation, sometimes called twist (D2 symmetry) can be derived from the boat conformation by applying a slight twist to the molecule about the axes connecting the two unique carbons. The result is a structure that has three C2 axes and no plane of symmetry.
The concentration of the twist-boat conformation at room temperature is very low (less than 0.1%) but at 1073 Kelvin it can reach 30%. Rapid cooling from 1073 K to 40 K will freeze in a large concentration of twist-boat conformation, which will then slowly convert to the chair conformation upon heating.
Read more about this topic: Cyclohexane Conformation