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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 572 (1989), S. 26-32 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of the Nitrido Complex [Na-15-crown-5]2[MoNF4]2 · 2 CH3CNThe title compound is synthesized by the reaction of [MoCl4(NSCl)]2 with excess NaF in boiling acetonitrile in the presence of the crown ether 15-crown-5. [Na-15-crown-5]2[MoNF4]2 · 2 CH3CN forms yellow crystals, which were characterized by an X-ray structure determination. Space group P1, Z = 1. Lattice dimensions at -90°C: a = 855.5, b = 1 069.9, C = 1 143.5 pm, α = 105.71°, β = 95.29°, γ = 102.25° (4 096 independent observed reflexions, R = 0.039). Short Na…F contacts of 234 pm with the four axial fluoro ligands of the dimeric anion [MoNF4]22- allow formulation of a triple ion. The centrosymmetric anion is dimerized by bent fluoro bridges with Mo—F distances of 198 and 245 pm. The long Mo—F distances of the MoF2Mo ring are in transposition to the nitrido ligands, the bond lengths of which (165 pm) correspond to triple bonds.
    Notes: Die Titelverbindung entsteht durch Reaktion von [MoCl4(NSCl)]2 mit überschüssigem NaF in siedendem Acetonitril in Gegenwart des Kronenethers 15-Krone-5. [Na-15-Krone-5]2[MoNF4]2 · 2 CH3CN bildet gelbe Kristalle, die wir durch eine röntgenographische Strukturanalyse charakterisiert haben. Raumgruppe P1, Z = 1. Gitterabmessungen (-90°C): a = 855,5; b = 1 069,9; c = 1 143,5 pm; α = 105,71°, β = 95,29°; γ = 102,25° (4 096 unabhängige, beobachtete Reflexe, R = 3,9%). Die Verbindung bildet Ionentripel, die durch je zwei kurze Na…F-Kontakte von 234 pm mit den vier axial angeordneten Fluorliganden des dimeren Anions [MoNF4]22- zustandekommen. Die Dimerisierung zum zentrosymmetrischen Anion erfolgt über gewinkelte Fluorobrücken mit Mo—F-Abständen von 198 und 245 pm. Die langen Mo—F-Abstände des MoF2Mo-Ringes befinden sich in trans-Position zu den Nitridoliganden, deren MoN-Abstände von 165 pm Dreifachbindungen entsprechen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 572 (1989), S. 18-25 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of the μ-Dinitridosulfate(II) Complex [Na-15-crown-5]2[μ-(NSN)(MoF5)2]The title compound is formed at room temperature by the reaction of [MoCl4(NSCl)]2 with the equivalent amount NaF in acetonitrile in presence of the crown ether 15-crown-5. It forms black, moisture-sensitive crystals that were characterized by an X-ray structure determination (1 756 unique observed reflexions, R = 0.073). Crystal data (19°C): a = 965.5, b = 3 219, c = 1 161.1 pm, β = 95.42°; space group P21/n, Z = 4. The structure consists of ion triples in which the [Na-15-crown-5]+ ions are associated with the [μ-(NSN)(MoF5)2]2- ions via Na…F contacts of 215 to 265 pm length. Each of the two MoF5 units of the anion is linked with one of the N atoms of the dinitridosulfate(II) group; bond angle NSN 103°, MoN bond lengths 172 pm.
    Notes: Die Titelverbindung entsteht durch Reaktion von [MoCl4(NSCl)]2 mit der äquivalenten Menge NaF in Acetonitril bei Raumtemperatur in Anwesenheit des Kronenethers 15-Krone-5. [Na-15-Krone-5]2[μ-(NSN)(MoF5)2] bildet in der Aufsicht schwarze, feuchtigkeitsempfindliche Kristalle, die wir durch eine röntgenographische Strukturanalyse charakterisiert haben. Raumgruppe P21/n, Z = 4, Gitterabmessungen (19°C): a = 965,5; b = 3 219; c = 1 161,1 pm; β = 95,42° (1 756 unabhängige, beobachtete Reflexe, R = 7,3%). Die Verbindung bildet Ionentripel, die durch Na…F-Kontakte von 215 bis 265 pm der Na-Atome der Kationen [Na-15-Krone-5]+ mit einem bzw. zwei F-Atomen der Anionen [μ-(NSN)(MoF5)2]2- zustandekommen. Die beiden MoF5-Einheiten des Anions sind über die N-Atome der Dinitridosulfat(II)-Gruppe (Bindungswinkel NSN = 103°) mit MoN-Abständen von 172 pm verknüpft.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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