The Crystal Structure of 5,5-Dimethyl-2-oxo-2-hydroxy-1,3,2-dioxaphosphorinane Monohydrate

Abstract
The crystal structure of 5,5-dimethyl-2-oxo-2-hydroxy-l,3,2-dioxaphosphorinane monohydrate (I) has been determined by the three dimensional X-ray diffraction method. The crystals belong to monoclinic system, with space group P21. The unit cell dimensions are; a=9.50, b=5.86, c=8.31 Å, β=106°8′, and two molecules per unit cell. The six-membered dioxaphosphorinane ring has a chair conformation, with P=O bond in equatorial position. The bond angles and distances of the phosphate group are similar to those found in the corresponding acyclic phosphates.