The Twist-Boat Conformation of Cyclohexane

Note that the structure has a twist such that there aren't any eclipsed hydrogens associated with the gauche C-C-C-C fragments. The twist also is such that the "flagpole" hydrogens avoid each other as much as possible.


Figure. The MP2(full)/6-31G* optimized structure of the twist-boat conformation of cyclohexane. This structure is a local minimum and less stable than the chair conformation.