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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 908-912 
    ISSN: 0044-2313
    Keywords: In[Nb6Cl15] ; Tl[Nb6Cl15] ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthese und Kristallstruktur von M[Nb6Cl15] (M = In, Tl): Neue ternäre Niobhalogenide mit verbrückten [Nb6Cl18]4- -ClusternDie neuen ternären Niobchloride M[Nb6Cl15] (M = In, Tl) wurden durch Festkörperreaktionen stöchiometrischer Gemische von NbCl5, Niobmetall und MCl3 bei 720°C dargestellt. Die Kristallstruktur von In[Nb6Cl15] wurde aus Einkristall-Röntgendaten bestimmt und in der orthorhombischen Symmetrie (Raumgruppe Pmma, Z = 4) mit a = 1786.6(1) pm, b = 1345,52(9) pm, c = 929,34(8) pm, R = 0,028, Rw = 0,037, GooF = 1,06 für alle symmetrieunabhängigen 1552 Reflexe verfeinert. Die Gitter-parameter der isotypen Verbindung Tl[Nb6Cl15] wurden aus Röntgen-Pulverdiffraktometerdaten verfeinert: a = 1785,9(2) pm, b = 1347,2(2) pm, c = 930,2(1) pm. Die Struktur besteht aus [Nb6Cl18]4--Clustern, die über terminale Chlorid-Liganden miteinander verbunden sind und zwei Sorten senkrecht zueinander stehender Ketten bilden, Diese Ketten sind über weitere terminale Liganden zu einem dreidimensionalen Netzwerk verbunden. Die In+- und Tl+-Ionen sind zehnfach koordiniert (in Form eines verzerrten zweifach bekappten Würfels), mit acht inneren und zwei äußeren Chlorid-Liganden.
    Notes: New ternary niobium chlorides corresponding to the formula M[Nb6Cl15] (M = In, T1) were synthesized from solid state reactions of NbCl5, niobium metal, and MCl3 at 720°C. The crystal structure of In[Nb6Cl15] was determined from single crystal X-ray diffraction studies. The structure was refined in the orthorhombic symmetry (space group Pmma, Z = 4) with a = 1786.6(1) pm, b = 1345.52(8) pm, c = 929.34(8) pm, RF = 0.028 and Rw = 0.037, GooF = 1.06 for all 1552 unique reflections. The lattice parameters of the isotypic Tl[Nb6Cl15] compound were refined from X-ray powder diffraction data: a = 1785.9(2) pm, b = 1347.2(2) pm, c = 930.2(1) pm. The structure of In[Nb6Cl15] is made up of [Nb6Cl18]4- clusters linked to each other through terminal chloride ligands to form two sets of chains perpendicular to each other. The chains are linked through other terminal ligands to yield a three-dimensional network. The In+ or Tl+ ions are located in a ten coordination site (distorted bicapped cubic geometry) made up of eight inner and two outer chloride ligands.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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