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  • Electronic Resource  (2)
  • Mixed valent Molybdenum(IV/V) and (III/IV/V)phosphates  (1)
  • hydrothermal synthesis  (1)
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  • Electronic Resource  (2)
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  • 1
    ISSN: 0947-6539
    Keywords: cadmium ; crystal structure ; hydrothermal synthesis ; hydroxyphosphate ; molybdenum ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Two new molybdenum(v) hydroxyphosphates have been synthesized hydrothermally, Na2Cd3(Mo2O4OH)6-(PO4)2(PO3OH)6[N(CH3)4]4·10H20 (1) and Cd9(Mo2O4OH)12(PO4)6(PO3OH)10-[N(CH3)4]8·15H2O (2). Their structures have been determined from single-crystal X-ray diffraction. The water molecules and hydroxyl groups have been deduced from valence calculations. Both compounds crystallize in the triclinic space group P1, with the cell parameters for 1 a = 12.340(2), b = 12.596(1), c = 14.717(2) Å, α = 107.24(1)°, β = 89.83(1)°, γ = 114.31(1)°, V = 1972.3(4) Å3, and for 2 a = 11.942(1), b = 13.339(2), c = 26.765(3) Å, α = 85.33(1)°, β = 86.87(1)°, γ = 64.08(1)°, V = 3821.3(9) Å3. The two frameworks can be described on the basis of similar [Mo6P4X31]n- (X = O, OH) anionic clusters, but 1 is a tridimensional structure, whereas 2 exhibits a monodimensional structure.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1841-1849 
    ISSN: 0044-2313
    Keywords: Mixed valent Molybdenum(IV/V) and (III/IV/V)phosphates ; single crystal structure ; Leucophosphite frameworks ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Eine Reihe von gemischt-valenten Molybdänmonophosphaten - isotyp mit Leucophosphiten wie CsMo2P2O10 und K1,5Mo2P2O10 · H2ODie Struktur von zwei gemischtvalenten Molybdänphosphaten, CsMo2P2O10 und K1,5Mo2P2O10 · H2O, wurde mittels Einkristall-Röntgen-Strukturanalyse bestimmt: Raumgruppe P21/c mit a = 9,428(1), b = 9,943(2), c = 12,348(2) Å, β = 127,38(1)° für CsMo2P2O10 und a = 9,721(2), b = 9,805(3), c = 12,329(3) Å, β = 128,73(2)° für K1,5Mo2P2O10 · H2O. Diese Verbindungen sind isotyp mit NH4Mo2P2O10 · H2O und RbMo2P2O10 · (1 - x)H2O, die die Leucophosphitstruktur repräsentieren. Die Möglichkeit eines Kationdefizits in dieser Struktur wird durch die Synthese der zwei isotypen Verbindungen A1,5Mo2P2O10 · xH2O (A = Rb, Tl) gezeigt. In diesen Monophosphaten ist eine Lage Mo(1) voll besetzt mit MoV, während die andere oktaedrische Lage Mo(2) mit Molybdän unterschiedlicher Valenz MoIII, MoIV bis MoV besetzt wird. Der wesentlichste Unterschied zwischen diesen verschiedenen Phosphaten beruht auf der Verteilung der A-Kationen in den Tunneln in Abhängigkeit von ihrer Größe und Art.
    Notes: The structure of two mixed valent molybdenum phosphates, CsMo2P2O10 and K1.5Mo2P2O10 · H2O has been solved from single crystals by X-ray diffraction in the space group P21/c with a = 9.428(1), b = 9.943(2), c = 12.348(2) Å and β = 127.38(1)° for CsMo2P2O10 and a = 9.721(2), b = 9.805(3), c = 12.329(3) Å and β = 128.73(2)° for K1.5Mo2P2O10 · H2O. These compounds isotypic with NH4Mo2P2O10 · H2O and RbMo2P2O10 · (1 - x)H2O exhibit the leucophosphite structure. The possibility of cationic non stoichiometry in this structure is also shown by the synthesis of two isotypic compounds A1.5Mo2P2O10 · xH2O (A = Rb, Tl). In these monophosphates, one site Mo(1) is fully occupied by MoV, whereas the other octahedral site Mo(2) exhibits a variable valency MoIII—MoIV to MoV. The main difference between these different phosphates deals with the distribution of the A cations inside the tunnels, depending upon their size and their content.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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