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  • Chemistry  (3)
  • GEOPHYSICS
  • 1990-1994  (3)
  • 1980-1984
  • 1960-1964
  • 1925-1929
  • 1990  (3)
  • 1
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 332 (1990), S. 359-366 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis, Coordination Chemistry and Mass Spectrometric Fragmentation of New N-(Thiocarbamoyl)-benzamidinesSyntheses of N-(thiocarbamoyl)benzamidines from benzimidoylchlorides and aromatic amino acids as starting materials are reported. The prepared compounds were used as ligands for complexing nickel(II) and copper(II)ions. The benzamidines were characterized by mass spectrometric methods. The fragmentation pattern of the benzamidines was derived from the corresponding MIKE-spectra.
    Additional Material: 2 Ill.
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  • 2
    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.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 586 (1990), S. 79-86 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Structure of Bis(3-diethylamino-5-phenyl-1,2,4-dithiazolium)-tetrachlorocobaltat(II)The title compound 1 was prepared by reaction of Tris(1,1-diethyl-3-benzoyl-thioureato)cobalt(III) with SOCl2 in acetonitrile. 1 has been characterized by IR-spectroscopy and VIS-spectroscopy.The structure of 1 has been determined by an X-ray structure analysis. The compound crystallizes in the monoclin space group C2/c with a = 16.224; b = 11.257; c = 17.697 Å; β = 107,43° and Z = 4. The final R value was R = 0.027 for 2073 observed reflections.The cation of 1 is nearly plane with an extended delocalization of electrons. The CoCl42- anion is tetrahedral with two different long Co—Cl pairs. Interionic contacts S … Cl exists between the structural units of the cations and the anion.
    Notes: Die Darstellung der Titelverbindung 1 erfolgt aus Tris(1,1-diethyl-3-benzoyl-thioureato)-cobalt(III) mit SOCl2 in Acetonitril. 1 wird IR-spektroskopisch und durch VIS-Spektren charakterisiert.Die Struktur von 1 wurde durch Röntgenkristallstrukturanalyse bestimmt. Die Verbindung kristallisiert monoklin in der Raumgruppe C2/c mit den Gitterkonstanten a = 16,224; b = 11,257; c = 17,697 Å, β = 107,43° und Z = 4. Der abschließende R-Wert betrug R = 0,027 für 2073 beobachtete Reflexe.Das Kation von 1 ist nahezu planar und weist eine weitreichende Elektronendelokalisierung auf. Das CoCl42--Anion ist tetraedrisch strukturiert und besitzt zwei unterschiedlich lange Co—Cl-Paare. Zwischen Kation- und Anion-Struktureinheiten bestehen über S und Cl interionische Wechselwirkungen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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