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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1847-1853 
    ISSN: 0044-2313
    Keywords: Selenium Halides ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structures of SeCl3+SbCl6-, SeBr3+GaBr4-, PCl4+SeCl5-, and (PPh4+)2SeCl42- · 2 CH3CNThe crystal structures of the title compounds were determined by X-ray diffraction.SeCl3+SbCl6-: Space group P21/m, Z = 4, structure determination with 1795 observed unique reflections, R = 0.022. Lattice dimensions at -80°C: a = 940.9, b = 1066.3, c = 1234.9 pm, β = 102.79°. The compound forms ion pairs with the structure of a double octahedron with linked surfaces. SeBr3+GaBr4-: Space group Pc, Z = 2, structure determination with 1461 observed unique reflections, R = 0.058. Lattice dimensions at -60°C: a = 660.1, b = 655.3, c = 1431.3 pm, β = 101.177°. The compound crystallizes in the SCl3[AlCl4] lattice type. Between the ions there are two relatively short Se … Br—Ga contacts.PCl4+SeCl5-: Space group Ima2, Z = 8, structure determination with 1757 observed unique reflections, R = 0.029. Lattice dimensions at -50°C: a = 1651.6, b = 1201.2, c = 1166.4 pm. The SeCl5- ions are associated to chains via interionic Se—Cl … Se contacts along the crystallographic c-axis.(PPh4+)2SeCl42- · 2CH3CN: Space group P21/n, Z = 2, structure determination with 2578 observed unique reflections, R = 0.050. Lattice dimensions at -80°C: a = 1288.5, b = 726.0, c = 2585.8 pm, β = 101.65°. The compound includes planar-tetragonal SeCl42- ions, which almost meet D4h symmetry.
    Notes: Die Kristallstrukturen der Titelverbindungen wurden röntgenographisch ermittelt.SeCl3+SbCl6-: Raumgruppe P21/m, Z = 4, Strukturlösung mit 1795 beobachteten unabhängigen Reflexen, R = 0,022. Gitterkonstanten bei -80°C: a = 940,9; b = 1066,3; c = 1234,9 pm; β = 102,79°. Die Verbindung bildet Ionenpaare mit der Struktur eines flächenverknüpften Doppeloktaeders.SeBr3+GaBr4-: Raumgruppe Pc, Z = 2, Strukturlösung mit 1461 beobachteten unabhängigen Reflexen, R = 0,058, Gitterkonstanten bei -60°C: a = 660,1; b = 655,3; c = 1431,3 pm; α = 101,17°. Die Verbindung kristallisiert im SCl3[AlCl4]-Strukturtyp. Zwischen den Ionen bestehen zwei relativ kurze Se … Br—Ga-Kontakte.PCl4+SeCl5-: Raumgruppe Ima2, Z = 8, Strukturlösung mit 1757 beobachteten unabhängigen Reflexen, R = 0,029. Gitterkonstanten bei -50°C; a = 1651,6; b = 1201,2; c = 1166,4 pm. Die SeCl5- -Ionen sind über interionische Se—Cl … Se-Kontakte entlang der kristallographischen c-Achse zu Ketten assoziiert.(PPh4+)2SeCl42- · 2CH3CN: Raumgruppe P21/n, Z = 2, Strukturlösung mit 2578 beobachteten unabhängigen Reflexen, R = 0,050. Gitterkonstanten bei -80°C: a = 1288,5; b = 726,0; c = 2585,8 pm; β = 101,65°. Die Verbindung enthält planar-quadratische SeCl42--Ionen, die nahezu D4h-Symmetrie erfüllen.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 739-744 
    ISSN: 0044-2313
    Keywords: Tellurium ; Nitride Chloride ; Synthesis ; IR spectra ; 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 the Tellurium Nitride Chloride [Te11N6Cl26]The title compound has been prepared by the reaction of tellurium tetrachloride with tris(trimethylsilyl)amine in boiling toluene. Pale yellow crystals of the composition [Te11N6Cl26]2 · 9C7H8 are obtained by cooling of the saturated solution. The compound was characterized by IR spectroscopy and by a crystal structure determination. Space group P1, Z = 1, structure solution with 5912 observed unique reflections, R = 0.043. Lattice dimensions at -50°C: a = 1636.2, b = 1692.7, c = 1704.1 pm, α = 60.57°, β = 69.59°, γ = 64.29°. The dominating structural element of the nitrchloride are planar Te5N3 units forming two four-member Te2N2 rings which are condensed together. Two asymmetric units [Te11N6Cl26] are linked by a centre of symmetry; the intercalated toluene molecules are without binding interactions.
    Notes: Die Titelverbindung entsteht durch Reaktion von Tellurtetrachlorid mit Tris(trimethylsilyl)amin in siedendem Toluol. Blaßgelbe Kristalle der Zusammensetzung [Te11N6Cl26]2 · 9C7H8 entstehen beim Abkühlen gesättigter Lösungen. Die Verbindung wird durch das IR-Spektrum und durch eine Kristallstrukturanalyse charakterisiert. Raumgruppe P1, Z = 1, Strukturlösung mit 5912 beobachteten unabhängigen Reflexen, R = 0,043. Gitterkonstanten bei -50°C: a = 1636,2; b = 1692,7; c = 1704,1 pm; α = 60,57 β = 69,59°; γ = 64,29°. Bestimmendes Strukturmotiv des Nitridchlorids sind planare Te5N3-Einheiten, die zwei miteinander kondensierte Te2N2-Viererringe bilden. Zwei asymmetrische Einheiten [Te11N6Cl26] sind über ein Symmetriezentrum miteiander verknüpft; die eingelagerten Toluomoleküle sind ohne bindende Wechselwirkung.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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