Abstract
Using a new semirigid model, conformation maps of cyclohexane, p‐dioxane, m‐dioxane, and cycloheptane are recalculated. The ideal out‐of‐plane coordinates are used together with in‐plane coordinates and are found to give the correct energies of all the significant conformations of six membered rings and of the chair–twist–chair form of cycloheptane. Conformation maps display higher symmetry than maps previously reported.