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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 606 (1991), S. 109-117 
    ISSN: 0044-2313
    Keywords: Pentachlorohenate(IV)-acetonitrile solvate ; synthesis ; IR spectrum ; 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 [Li(12-Crown-4)2][ReCl5(CH3CN)] · CH3CNThe title compound has been prepared by the reaction of lithium chloride with rhenium pentachloride in the presence of 12-crown-4 in acetonitrile solution.[Li(12-crown-4)2][ReCl5(CH3CN)] · CH3CN has been characterized by IR spectroscopy as well as by an X-ray structure determination. Space group P1, Z = 2, 4 450 observed unique reflections, R = 0.047, Lattice dimensions at 20°C: a = 1 445.8, b = 1 463.2, c = 1 580.2 pm, α = 89.28°, β = 114.19°, γ = 89.40°. The compound is ionic, the cation being formed by a lithium ion coordinated by the eight oxygen atoms of two crown ether molecules 12-crown-4 in sandwich fashion. In the anions [ReCl5(CH3CN)]- the rhenium atoms are in a distorted octahedral shape by the five chlorine atoms and by the N atom of the acetonitrile molecule. The two crystallographically independent cations and anions, respectively, are only slightly different.
    Notes: Die Titelverbindung wurde durch Reaktion von Lithiumchlorid mit Rheniumpentachlorid in Gegenwart von 12-Krone-4 in Acetonitrillösung hergestellt und durch ihr IR-Spektrum und durch eine röntgenographische Strukturanalyse charakterisiert.[Li(12-Krone-4)2][ReCl5(CH3CN)] · CH3CN kristallisiert triklin in der Raumgruppe P1 mit zwei Formeleinheiten pro Elementarzelle, 4 450 beobachtete unabhängige Reflexe, R = 4,7%. Gitterabmessungen bei 20°C: a = 1 445,8; b = 1 463,2; c = 1 580,2 pm; α = 89,28°; β = 114,19°; γ = 89,40°. Die Verbindung hat einen ionischen Aufbau, in dem die Lithiumionen sandwichartig von den acht Sauerstoffatomen zweier Kronenethermoleküle 12-Krone-4 koordiniert sind. In den Anionen [ReCl5(CH3CN)]- sind die Rheniumatome verzerrt oktaedrisch von den fünf Chloratomen und von dem N-Atom des Acetonitrilmoleküls umgeben. Die beiden kristallographisch unabhängigen Kationen bzw. Anionen unterscheiden sich nur wenig voneinander.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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