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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1193-1196 
    ISSN: 0044-2313
    Keywords: Potassium bromide hydroxide ; Rubidium bromide hydroxide ; synthesis ; single-crystals ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: K2Br(OH) and Rb2Br(OH): Two New Ternary Alkali Metal Halide Hydroxides with a Pronounced Structural Relationship to KOH resp. RbOHTwo isotypic compounds K2Br(OH) and Rb2Br(OH) were prepared in the systems KOH/KBr and RbOH/RbBr. Their structures were determined by single crystal X-ray methods:K2Br(OH): P21/m, Z = 2, a = 6.724(1) Å, b = 4.272(4) Å, c = 8.442(2) Å, β = 108.14(2)°, Z(Fo) = 651 with (Fo)2 ≥ 3σ(Fo)2, Z(parameter) = 28, R/Rw = 0.041/0.047Rb2Br(OH): P21/m, Z = 2, a = 6.918(3) Å, b = 4.483(2) Å, c = 8.850(5) Å, β = 108.08(6)°, Z(Fo) = 326 mit (Fo)2 ≥ 3σ(Fo)2, Z(parameter) = 27, R/Rw = 0.074/0.082.The compounds are built up by chains of ∞1[M2(OH)+] connected via Br-. The structure of the chains as well as their orientation to one another show a pronounced relationship to the structures of the room temperature modifications of the isotypic binary hydroxides KOH and RbOH.
    Notes: In den pseudobinären Systemen KOH/KBr und RbOH/RbBr konnten die beiden isotypen Verbindungen K2Br(OH) und Rb2Br(OH) dargestellt werden. Ihre Struktur wurde mittels Röntgenstrukturanalyse an Einkristallen aufgeklärt:K2Br(OH): P21/m, Z = 2, a = 6,724(1) Å, b = 4,272(4) Å, c = 8,442(2) Å, β = 108,14(2)°, Z(Fo) = 651 mit (Fo)2 ≥ 3σ(Fo)2, Z(Parameter) = 28, R/Rw = 0,041/0,047.Rb2Br(OH): P21/m, Z = 2, a = 6,918(3) Å, b = 4,483(2) Å, c = 8,850(5) Å, β = 108,08(6)°, Z(Fo) = 326 mit (Fo)2 ≥ 3σ(Fo)2, Z(Parameter) = 27, R/Rw = 0,074/0,082.Die Verbindungen sind aus isolierten Strängen von ∞1[M2(OH)+] aufgebaut, die durch Br- verknüpft werden. Sowohl der Aufbau der einzelnen Stränge als auch ihre Orientierung zueinander zeigen eine deutliche Verwandtschaft zum Aufbau der Raumtemperaturform der ebenfalls isotypen binären Hydroxide KOH und RbOH.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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