Spatial structure of the stereoisomers of 5-phenyl-5-oxo-2,4,6-trimethyl-1,3,5-dioxaphosphorinane

1. The stereoisomers of 5-phenyl-5-oxo-2,4,6-trimethyl-1,3,5-dioxaphosphorinane have been obtained. 2. The stereoisomers obtained have equatorial CH3 groups and differ with respect to the orientation of the P=O bond. 3. The stereoisomer with the equatorial orientation of the P=O bond predominates at equilibrium.