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  • General Chemistry  (3)
  • Arsenic compounds  (1)
  • Fluoro Complexes  (1)
  • 1995-1999  (5)
  • 1996  (5)
  • 1
    ISSN: 0009-2940
    Keywords: Phosphane iminato complexes ; Arsenic compounds ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Phosphane Iminato Complexes of Arsenic. Crystal Structures of [AsCl(NPMe3)]2Cl2, [AsCl(NPMe3)2SbCl4]SbCl6, and [AsCl(NPMe3)2SnCl4] · CH3CN[AsCl(NPMe3)]2Cl2 (1) was prepared by the reaction of arsenic trichloride with the silylated phosphane imine Me3-SiNPMe3 in acetonitrile solution. According to the crystal structure determination, 1 has an ionic structure with [AsCl(NPMe3)]22+ ions, in which the As atoms are linked by the μ2-N atoms of the NPMe3- groups. Compound 1 reacts with antimony pentachloride to give [AsCl(NP-Me3)2SbCl4]+SbCl6- (2), with tin tetrachloride to form [AsCl(NPMe3)2SnCl4] (3), which is isoelectronic to the cation of 2. In 2 and 3 AsCl(NPMe3)2 acts as a chelating agent forming and , respectively, four-membered ring structures.
    Additional Material: 4 Ill.
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  • 2
    ISSN: 0947-6539
    Keywords: ab initio calculations ; crystal structure ; halogen compounds ; nitrides ; selenium compounds ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Se2NBr3, a planar molecule shaped liked dividers, was formed by the reaction of SeBr4 with N(SiMe3)3, which reduced the selenium to the trivalent state. Under the same conditions, Se2NCl5 was obtained by the reaction of SeCl4 with N(SiMe3)3, retaining the tetravalent state of selenium. The molecule is formed by two edge-sharing pseudotrigonal bipyramids with selenium as their central atoms. Se2NCl5 reacts with PPh4Cl to form the Se2NCl-6 ion by the addition of a Cl- ion to only one of the two selenium atoms, resulting in pseudooctahedral coordination of this atom. Ab initio calculations for all the compounds reported confirm the experimentally determined structures.
    Additional Material: 7 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 108 (1996), S. 2696-2696 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 4
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 5
    ISSN: 0044-2313
    Keywords: Phosphoraneiminato Complexes of Antimony(III) ; Fluoro Complexes ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structures of the Phosphoraneiminato Complexes [SbF2(NPEt3)]2 and [SbF(NPEt3)2]2 as well as of NMe4+SbF4-The title compounds have been prepared from antimony trifluoride with the silylated phosphaneimine Me3SiNPEt3 and [NMe4]F, respectively. They were characterized by IR spectroscopy and by crystal structure determinations.[SbF2(NPEt3)]2: Space group Pbca, Z = 8, structure determination with 1264 unique reflections, R1 = 0.028 for reflections with I 〉 2σ(I). Lattice dimensions at -80°C: a = 1284.8, b = 1162.4, c = 1380.4 pm. The compound forms centrosymmetric dimeric molecules, in which the Ψ-trigonal-bipyramidal coordinated antimony atoms are linked via μ2-N bridges of the NPEt3- ligands.[SbF(NPEt3)2]2: Space group P21/c, Z = 4, structure determination with 2270 unique reflections, R1 = 0.029 for reflections with I 〉 2μ(I). Lattice dimensions at -75°C: a = 815.8, b = 1121.2, c = 2068.5 pm, β = 101.09°. The compound forms centrosymmetric dimeric molecules, in which the Ψ-trigonal-bipyramidal coordinated antimony atoms are linked via μ2-N bridges of one of the two NPEt3- ligands. The other NPEt3- group is terminally connected.NMe4+SbF4-: Space group P21/c, Z = 4, structure determination with 1503 unique reflections, R1 = 0.069 for reflections with I 〉 2μ(I). Lattice dimensions at -50°C: a = 539.80, b = 896.10, c = 1760.3 pm, β = 90.338°. The compound includes monomeric SbF4- ions with distorted Ψ-trigonal-bipyramidal environment of the antimony atoms.
    Notes: Die Titelverbindungen entstehen durch Reaktion von Antimontrifluorid mit dem silylierten Phosphanimin Me3SiNPEt3 bzw. mit Tetramethylammonium-Fluorid. Sie werden IR-spektroskopisch und durch Kristallstrukturanalysen charakterisiert.[SbF2(NPEt3)]2: Raumgruppe Pbca, Z = 8, Strukturlösung mit 1264 unabhängigen Reflexen, R1 = 0,028 für Reflexe mit I 〉 2σ(I). Gitterkonstanten bei -80°C: a = 1284,8; b = 1162,4; c = 1380,4 pm. Die Verbindung bildet zentrosymmetrische dimere Moleküle, in denen die Ψ-trigonal-bipyramidal koordinierten Antimonatome über μ2-N-Brücken der NPEt3--Liganden verknüpft sind.[SbF(NPEt3)2]2: Raumgruppe P21/c, Z = 4, Strukturlösung mit 2270 unabhängigen Reflexen, R1 = 0,029 für Reflexe mit I 〉 2σ(I). Gitterkonstanten bei -75°C: a = 815,8; b = 1121,2; c = 2068,5 pm; β = 101,09°. Die Verbindung bildet zentrosymmetrische dimere Moleküle, in denen die Ψ-trigonal-bipyramidal koordinierten Antimonatome über μ2-N-Brücken eines der beiden NPEt3--Liganden verknüpft sind. Die zweite NPEt3--Gruppe ist terminal gebunden.NMe4+SbF4-: Raumgruppe P21/c, Z = 4, Strukturlösung mit 1503 unabhängigen Reflexen, R1 = 0,069 für Reflexe mit I 〉 2σ(I). Gitterkonstanten bei -50°C: a = 539,80; b = 896,10; c = 1760,3 pm; β = 90,338°. Die Verbindung enthält monomere SbF4--Ionen mit verzerrt Ψ-trigonal-bipyramidaler Umgebung der Antimonatome.
    Additional Material: 4 Ill.
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