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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 569 (1989), S. 16-30 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The First Binuclear Oxoferrate(II): „Cs2K4[O2FeOFeO2]“For the first time „Cs2K4[Fe2O5]“ was obtained by annealing intimate mixtures of Cs2O, K2O, and CsFeO2 (molar ratio Cs : K : CsFeO2 1.3 : 2.1 : 1) in a closed Fe-cylinder (74 d; 470°C) in the form of red single crystals. The structure determination (four-circle diffractometer, MoKα, 760 out of 857 Io(h kl); R = 5.8%, Rw = 4.6%) confirms the space group C2/m; a = 707.4, b = 1138.5, c = 699.7 pm, β = 91.76°, Z = 2. Essential part of the structure is the binuclear, planar [O(1)2Fe—O(2)—FeO(1)2]6- group which is for the first time observed with oxoferrates(II).Despite different space groups the crystal structure is related to that of Rb2Na4[Co2O5].
    Notes: „Cs2K4[Fe2O5]“ wurde erstmals durch Tempern inniger Gemenge von Cs2O, K2O und CsFeO2 (Einwaageverhältnis Cs:K:CsFeO2 1,3 : 2,1 : 1) in einem verschlossenen Fe-Zylinder (74 d; 470°C) in Form von granatroten Einkristallen erhalten. Die Strukturaufklärung (Vierkreisdiffraktometerdaten, MoKα, 760 von 857 Io(h kl); R = 5,8%, Rw = 4,6%) belegt die Raumgruppe C2/m; a = 707,4, b = 1138,5, c = 699,7 pm, β = 91,76°, Z = 2. Wesentlicher Teil der Kristallstruktur ist die zweikernige, planare Baugruppe [O(1)2Fe—O(2)—FeO(1)2]6-, die erstmals bei Oxoferraten(II) beobachtet wird.Die Struktur ist trotz unterschiedlicher Raumgruppen verwandt mit der von Rb2Na4[Co2O5].
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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