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  • 1
    ISSN: 0044-2313
    Keywords: Sodium tetraoxo nitrido tungstate(VI) ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of Sodium Tetraoxo Nitrido Tungstate(VI), Na5WO4NColourless crystals of Na5WO4N are obtained besides Na4WO2N2 [1] by the reaction of WO3 with NaNH2 (15:1) at 350°C ≥ T ≥ 750°C in autoclaves to prevent early decomposition of sodium amide. X-ray single crystal investigations are characterized by the following data:Na5WO4N: Cmc21 (No. 36), Z = 4a = 9.873(2) Å, b = 5.769(1) Å, c = 10.648(2) ÅZ(F2o)≥ 3σ(F2o) = 2182, Z(Var.) = 55, R/Rw = 0.029/0.039The structure contains the tetragonal pyramidal ion WO4N5- with nitrogen at the apex connected via Na+ ions irregularly coordinated by one nitrogen and four oxygen atoms of different anions.
    Notes: Farblose Kristalle von Na5WO4N entstehen neben Na4WO2N2 [1] bei der Umsetzung von WO3 mit NaNH2 (15:1) bei 350°C ≥ T ≥ 750°C in Autoklaven, die eine frühzeitige Zersetzung von Natriumamid verhindern. Die röntgenographische Strukturbestimmung an Einkristallen ist durch folgende Daten charakterisiert:Na5WO4N: Cmc21 (Nr. 36), Z = 4a = 9,873(2) Å, b = 5,769(1) Å, c = 10,648(2) ÅZ(F2o) ≥ 3σ(F2o) = 2182, Z(Var.) = 55, R/Rw = 0,029/0,039Die Struktur enthält das tetragonal pyramidale Ion WO4N5 mit Stickstoff in apikaler Position. Die Anionen sind durch Na+-Ionen verknüpft, die unregelmäßig von einem N- und vier O-Atomen unterschiedlicher Anionen koordiniert sind.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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