Configurations and conformations of the geometrical isomers of 2-ethoxy-4-methyl-1,3,2-dioxaphosphorinane
Abstract
The more stable stereoisomer of 2-ethoxy-4-methyl-1,3,2-dioxaphosphorinane has the trans-configuration and assumes a chair conformation with equatorial methyl and axial ethoxy-group, whilst the less stable isomer has the cis-configuration and, at room temperature, adopts a rapidly flipping chair conformation.