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  • 1
    Electronic Resource
    Electronic Resource
    Zur Struktur und Konstitution von Dichloro(tetraalkylcyclobutadien)platin(II)-Komplexen (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1421-1425 
    Details
    ISSN: 0044-2313
    Keywords: Platinum complexes ; cyclobutadiene complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structure and Constitution of Dichloro(tetraalkylcyclobutadiene)platinum(II) ComplexesHexachloroplatinic acid reacts in n-butanol with alkylsubstituted acetylenes RC≡CR (R = Me, Et) to give [PtCl2(C4R4)] (R = Me (1), R = Et (2)). The X-ray structure analysis of 1 (C2/m; a = 1 370.3(2), b = 1 128.3(1), c = 691.21(7) pm, β = 96.10(1)α; Z = 4) shows that 1 is monomeric and not dimeric as was described in the literature. Furthermore, 1 and 2 were extensively studied by i.r., Raman, and n.m.r. spectroscopical investigations.
    Notes: Hexachloroplatin(IV)-säure reagiert in n-Butanol mit alkylsubstituierten Acetylenen RC≡CR (R = Me, Et) zu Platincyclobutadien-Komplexen [PtCl2(C4R4)] (R = Me (1), R = Et (2)). Die Röntgeneinkristallstrukturanalyse von 1 (C2/m; a = 1 370,3(2), b = 1 128,3(1), c = 691,21(7) pm, β = 96 10(1)°; Z = 4) belegt, daß 1 monomer und nicht - wie bisher beschrieben - dimer aufgebaut ist. Desweiteren sind 1 und 2 umfassend durch IR-, Raman- und NMR-spektroskopische Untersuchungen charakterisiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210823
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  • 2
    Electronic Resource
    Electronic Resource
    Der Begriff der Arzneimittel im Patentgesetz und Seine Auslegung in der Praxis des Reichspatentamts (1921)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 34 (1921), S. 361-363 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19210345602
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  • 3
    Electronic Resource
    Electronic Resource
    Kristall- und Molekülstruktur von 6-Ethoxy-12,12-dimethyldibenzo[d, g]-1,3,2,6-dioxaphosphasilocin-6-oxidIn memoriam Professor Alfred Tzschach. (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 586 (1990), S. 30-36 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure of 6-Ethoxy-12,12-dimethyl-dibenzo[d, g]-1,3,2,6-dioxaphosphasilocine 6-OxideThe title compound crystallizes in the monoclinic space group P21/n with lattice parameters a = 824.0(1), b = 2207.5(3), c = 931.1(1) pm, β = 95.50(1)° and a unit cell contents of four molecules. The structures was solved by heavy atom method and refined to R = 0.057 using 1924 observed unique reflections. The eightmembered dioxaphosphasilocine ring adopts an irregular geometry far from any symmetry. The Si atom has an approximately tetrahedral environment whereas the P atom is more distorted tetrahedrally coordinated.
    Notes: Die Titelverbindung kristallisiert in der monoklinen Raumgruppe P21/n mit den Gitterkonstanten a = 824,0(1), b = 2207,5(3) pm, c = 931,1(1) pm, β = 95,50(1)° und vier Molekülen pro Elementarzelle. Die Struktur wurde auf der Grundlage von 1924 beobachteten symmetrieunabhängigen Reflexintensitäten nach der Schweratommethode gelöst und bis zu einem R-Wert von 0,057 verfeinert. Der achtgliedrige Dioxaphosphasilocin-Ring weist eine völlig unregelmäßige Geometrie ohne Symmetrieannäherung auf. Das Si-Atom besitzt in guter Näherung eine regelmäßige tetraedrische Umgebung, das P-Atom ist dagegen stärker verzerrt tetraedrisch koordiniert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905860105
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  • 4
    Electronic Resource
    Electronic Resource
    Binary alkali metal compounds with the zintl anions [Ge9]4- and [Sn9]4-Professor Welf Bronger zum 65. Geburtstag gewidmet (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1037-1039 
    Details
    ISSN: 0044-2313
    Keywords: Alkali metal germanides and stannides ; Zintl cluster anions ; Vibrational spectra ; Thermal decomposition ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The binary germanides M12Ge17 and M4Ge9 (M = Na, K, Rb, Cs) and the stannides M12Sn17 and M4Sn9 (M = K, Rb, Cs) were identified by a combination of direct synthesis, thermogravimetric analysis, vibrational spectroscopy, X-ray powder data and single crystal structure analysis. The M12E17 phases contain the cluster anions [E9]4- and [E4]4- in the ratio 1:2, forming a hierarchical structure with the cluster anions at the atomic positions of the hexagonal Laves phase MgZn2. Like the M4E4 phases, the M4Ge9 compounds are hierarchical derivatives of the cubic Cr3Si structure but with [Ge9]4- anions. The thermogravimetric analyses give strong evidence for the existence of at least one more phase with [E9]4- and [E4]4- clusters and of the clathrate phases M6E136 in addition to the well-known M8E44□2 chlathrates.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230704
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