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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1699-1703 
    ISSN: 0044-2313
    Keywords: Polyselenido Complex of Mercury ; 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 [Na(12-Crown-4)2]2[Hg(Se4)2] · 1.5 DMF.The title compound has been prepared by the reaction of Na2Se4 with mercury acetate in DMF solution in the presence of 15-crown-5, forming dark red crystal needles. [Na(12-crown-4)2]2[Hg(Se4)2] · 1.5 DMF crystallizes in the space group C2/c with eight formula units per unit cell. The structure was determined with 3 824 observed unique reflections, R = 0.085. Lattice dimensions at - 70°C: a = 2 884(2), b = 1 407.7(7), c = 2 843(2) pm, β = 93.93(5)°. The structure consists of [Na(12-crown-4)2]+ ions with a sandwichlike coordination of the crown ether molecules, and of [Hg(Se4)2]2- ions, in which the mercury atom is coordinated by two tetraselenido ions in a chelating fashion. The [Hg(Se4)2]2- ions are arranged to infinite chains via Se…Se contacts.
    Notes: Die Titelverbindung entsteht in Form dunkelroter Kristallnadeln bei der Reaktion von Na2Se4 mit Quecksilberacetat bei Gegenwart von 15-Krone-5 in Dimethylformamidlösung. [Na(12-Krone-4)2]2[Hg(Se4)2] · 1,5 DMF kristallisiert monoklin in der Raumgruppe C2/c mit acht Formeleinheiten pro Elementarzelle. Strukturlösung mit 3 824 unabhängigen beobachteten Reflexen, R = 0,085. Gitterkonstanten bei - 70°C: a = 2 884(2), b = 1 407,7(7), c = 2 843(2) pm, β = 93,93(5)°. Die Verbindung besteht aus [Na(12-Krone-4)2]+-Ionen mit sandwichartigem Aufbau und [Hg(Se4)2]2--Ionen, in denen das Quecksilberatom chelatartig von zwei Tetraselenidionen koordiniert ist. Die [Hg(Se4)2]2--Ionen sind über interionische Se…Se-Kontakte zu Strängen angeordnet.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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