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  • 1
    ISSN: 0044-2313
    Keywords: Gold trichloride ; gold tribromide ; bismuth trichloride ; bismuth tribromide ; solvothermal synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Lewis-Acid-Base-Reactions of Gold Trihalides with Bismuth Trihalides - Synthesis and Structures of AuBiX6 (X = CI, Br)Gold trihalides AuX3 (X = Cl, Br) react with bismuth trihalides in sealed glass ampoules to the 1 : 1 adducts AuBiX6 (X = Cl, Br). AuBiCl6 is obtained by a chemical transport reaction at 220°C, whereas AuBiBr6 was synthesized by solvothermal reaction in SiBr4 at 150°C. Both compounds crystallize triclinic, space group P1, Z = 4. AuBiCl6; a = 698.3(4) pm; b = 1009.3(5) pm; c = 1381(1) pm; α = 104.98(5)°; β = 94.73(5)°; γ = 110.06(3)°; V = 867(1) · 106 pm3. AuBiBr6: a = 735.7(4) pm; b = 1055.7(5) pm; c = 1445(1) pm; α =104.88(5)°; β = 94.25(5)°; γ = 110.18(4)°; V =1001(1) ·106pm3. The structures are build formally of square-planar [AuX4]- and chains of edge-connected ([BiX4/2]+)n units. Since each Bi ion is surrounded by eight halogenide ions in a square-antiprismatic form, the structure can alternatively be described as consisting of chains of edge sharing ([BiX4X4/2]3-)n antiprisms connected by Au3+ ions.
    Notes: Goldtrihalogenide AuX3 (X = CI, Br) reagieren mit den entsprechenden Bismuttrihalogeniden BiX3 (X = Cl, Br) in geschlossenen Ampullen zu den 1 : 1-Addukten AuBiX6. AuBiCl6 entsteht bei 220°C unter den Bedingungen des chemischen Transportes, während AuBiBr6 wegen der geringen thermischen Stabilität von AuBr3 unter solvothermalen Bedingungen in SiBr4 als Lösungsmittel bei 150°C dargestellt wurde. Beide Verbindungen sind isotyp und kristallisieren triklin in der Raumgruppe P1, Z = 4, mit den Gitterkonstanten a = 698,3(4) pm; b = 1009,3(5) pm; c = 1381(1) pm; α = 104,98(5)°; β = 94,73(5)°; γ = 110,06(3)° für AuBiCl6 und a = 735,7(4) pm; b = 1055,7(5) pm; c = 1445(1) pm; α = 104,88(5)°; β = 94,25(5)°; γ = 110,18(4)° für AuBiBr6. Die Strukturen sind aus quadratisch-planaren [AuX4]--Ionen und Ketten aus kantenverknüpften ([BiX4/2]+)n-Einheiten aufgebaut. Da die Bi-Ionen von acht Halogenid-Ionen in Form eines quadratischen Antiprismas umgeben sind, kann die Struktur alternativ so beschrieben werden, daß sie aus Ketten kantenverknüpfter ([BiX4X4/2]3- )n-Antiprismen besteht, die über Au3+ -Ionen verbunden sind.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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