title: Heteropolymolybdates of phosphate, phosphonate, and phosphite functionalized by glycine.
abstract: The novel, functionalized heteropolymolybdates [RPMo(6)O(21)(O(2)CCH(2)NH(3))(3)](2)(-) (R = OH, CH(3), C(2)H(5), H) have been synthesized and characterized by IR, (31)P NMR spectroscopy, and elemental analysis. Single-crystal X-ray analysis was carried out on K(2)[HOPMo(6)O(21)(O(2)CCH(2)NH(3))(3)].8.5H(2)O, which crystallizes in the orthorhombic system, space group Pnma, with a = 14.118(2) A, b = 20.660(3) A, c = 12.191(2) A, and Z = 4; K(2)[H(3)CPMo(6)O(21)(O(2)CCH(2)NH(3))(3)].8.5H(2)O, which crystallizes in the orthorhombic system, space group Pnma, with a = 14.1643(6) A, b = 20.8658(8) A, c = 12.2235(5) A, and Z = 4; and K(2)[HPMo(6)O(21)(O(2)CCH(2)NH(3))(3)].8H(2)O, which crystallizes in the orthorhombic system, space group Pnma, with a = 14.092(3) A, b = 20.696(2) A, c = 12.199(4) A, and Z = 4. We also report on the synthesis and characterization of the isostructural derivative K(2)[H(5)C(2)PMo(6)O(21)(O(2)CCH(2)NH(3))(3)]. The four title polyanions consist of an RP (R = OH, CH(3), C(2)H(5), H) hetero group surrounded by a ring of six MoO(6) octahedra sharing edges and corners alternatingly. Three glycine molecules are each bound to two edge-sharing Mo centers via their carboxylate functionality on the same side of the ring. The central phosphorus atom is located slightly above the plane of the six molybdenums, and its terminal R group is on the same side of the ring as the glycines. NMR studies show that the solid state structures of the title compounds are preserved in solution.
authors.affiliation: School of Engineering and Science, International University Bremen, 28725 Bremen, Germany. u.kortz@iu-bremen.de
authors.forename: Ulrich
authors.initials: U
authors.lastname: Kortz
authors.forename: Jacqueline
authors.initials: J
authors.lastname: Vaissermann
authors.forename: René
authors.initials: R
authors.lastname: Thouvenot
authors.forename: Pierre
authors.initials: P
authors.lastname: Gouzerh
mesh_terms: D018360:Crystallography, X-Ray; D003500:Cyclization; D005998:Glycine / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008982:Molybdenum / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D063065:Organophosphonates / Q000138:chemical synthesis* / Q000737:chemistry; D010710:Phosphates / Q000138:chemical synthesis* / Q000737:chemistry; D017905:Phosphites / Q000138:chemical synthesis* / Q000737:chemistry; D010759:Phosphorus Isotopes
chemical_list: D009942:Organometallic Compounds; D063065:Organophosphonates; D010710:Phosphates; D017905:Phosphites; D010759:Phosphorus Isotopes; D008982:Molybdenum; D005998:Glycine