The as yet structurally uncharacterized title compound, C2H8O4P2, was isola
ted as a by-product of the synthesis of 1,2-bis(dimethylphosphino)ethane (d
mpe) from 1,2-bis (dichlorophosphino) ethane. In the crystal structure, whi
ch is characterized by strong intermolecular O-H ... Osp(2) hydrogen bonds,
only the R*,S* diastereomer is found. The molecule is located on a center
of inversion intersecting the central C-C bond, thereby preserving the mole
cular C-i symmetry.