ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, cilt.65, 2009 (SCI-Expanded)
The title compound, C(12)H(19)O(4)P, has a distorted tetrahedral geometry around the P atom. The molecules form dimers with R(2)(2)(10) ring motifs due to intermolecular O-H center dot center dot center dot O hydrogen bonds. The double-bonded O atom of the phosphonate group behaves as an acceptor and the hydroxy group acts as a donor. Both of the ethyl groups are disordered with occupancies of 0.55:0.45 and 0.725:0.275.