title: Structure of disodium methyl phosphate hexahydrate.
abstract: 2Na+.CH3O4P2-.6H2O, Mr = 264.09, monoclinic, Pc, a = 7.277 (1), b = 6.298 (2), c = 11.477 (4) A, beta = 92.44 degrees, V = 525.5 A3, Z = 2, Dx = 1.669 g cm-3, lambda (Cu K alpha) = 1.5418 A, mu = 35.26 cm-1, F(000) = 276, T = 298 K, R = 0.028 for 781 independent reflections. Three P-O bond lengths are the same (1.513 A) within experimental error, with the ester P-O bond length significantly longer [1.626 (3) A]. The Na ions are octahedrally coordinated by water O atoms and have no direct interaction with the phosphate O atoms. Water molecules form three hydrogen bonds with each phosphate O atom, except the ester O atom which at most forms one weak interaction.
authors.affiliation: Department of Crystallography, University of Pittsburgh, PA 15260.
authors.forename: W T
authors.initials: WT
authors.lastname: Klooster
authors.forename: B M
authors.initials: BM
authors.lastname: Craven
mesh_terms: D003460:Crystallization; D008956:Models, Chemical; D008968:Molecular Conformation; D010755:Organophosphates / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D012964:Sodium / Q000737:chemistry; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D010755:Organophosphates; D014867:Water; C027265:methylphosphate; D012964:Sodium; D010100:Oxygen