Ultrasonic relaxation and the chair–boat equilibrium in some substituted 1,3-dioxans
Abstract
Ultrasonic relaxation has been observed in a number of alkyl-substituted 1,3-dioxans: relaxation of the 2-alkyl derivatives has been attributed to ring inversion, whilst the relaxation found in 2,2,4- and 2,2-substituted derivatives is considered to be the result of the perturbation of a chair–boat equilibrium.