The three acidic protons are associated with the phosphonate group. The H atoms were located on difference electron-density maps and their positions refined with isotropic displacement parameters set at 1.2 times that of the attached atom at the time of their inclusion. The packing scheme is somewhat different from what is observed for the isomeric 4-fluoro-3-sulfonatobenzylphosphonic acid hydrate. That structure also contains layers with the acidic groups on opposite faces, however, the water molecules are associated with the sulfonate groups in between every pair of layers.
|Number of pages||2|
|Journal||Acta Crystallographica Section C: Crystal Structure Communications|
|State||Published - 2000|