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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1583-1590 
    ISSN: 0044-2313
    Keywords: Bismuth ruthenium bromide ; bismuth ruthenium iodide ; subhalide ; crystal structure ; chemical bonding ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bi4RuBr2 and Bi4RuI2: Two Varieties of a Column Structure with Face-Sharing [RuBi8/2] Square AntiprismsReaction of the elements yields black, lustrous, air insensitive crystals of the subhalides Bi4RuI2 (tetragonal, I4/m, a = 1183.9(2) pm, c = 669.7(2) pm, V = 938.66 · 106 pm3) and Bi4RuBr2 (monoclinic, I112/m, a = 1211.9(2) pm, b = 1072.6(2) pm, c = 663.9(2) pm, γ = 91.63(1)°, V = 862.64 · 106 pm3). The structures of the homöotypic compounds contain ∞1[RuBi8/2] strands of face-sharing square antiprisms. Halogen atoms lie above the edges of alternate Bi4 squares. Thereby chemical bonding differs significantly within the two types of Bi4 squares. Though the Ru atoms on the central axis of the strand of antiprisms form pairs, extended Hückel calculations give no evidence of Ru—Ru bonds.
    Notes: Durch Umsetzung der Elemente werden schwarze, metallisch glänzende, luftstabile Kristalle der Subhalogenide Bi4RuI2 (tetragonal, I4/m, a = 1183,9(2) pm, c = 669,7(2) pm, V = 938,66 · 106 pm3) und Bi4RuBr2 (monoklin, I112/m,a = 1211,9(2) pm, b = 1072,6(2) pm, c = 663,9(2) pm, γ = 91,63(1)°, V = 862,64 · 106 pm3) erhalten. In den Strukturen der homöotypen Verbindungen liegen ∞1[RuBi8/2]-Stränge aus flächenverknüpften, quadratischen Antiprismen vor. Die Kanten jedes zweiten Bi4-Quadrates in einer Säule sind mit Halogenatomen überbrückt. Dadurch unterscheiden sich die Bindungsverhältnisse in den beiden Sorten von Bi4-Quadraten wesentlich. Die Ru-Atome auf der zentralen Achse des Antiprismenstranges bilden Paare, doch liegen nach Extended-Hückel-Rechnungen keine Ru—Ru-Bindungen vor.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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