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  • 1
    ISSN: 0044-2313
    Keywords: Tetramethyltitanium-1,2-bis(dimethylphosphino)-ethane ; NMR data ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Transition Metal Alkyl Compounds. 61. Preparation and Crystal Structure of Tetramethyltitanium-1,2-bis(dimethylphosphino)ethaneThe title complex 1 was synthesized by addition of 1,2-bis(dimethylphosphino)ethane to a solution of tetramethyltitanium in diethylether. The complex was characterized by 1H, 13C and 31P NMR spectra and by X-ray crystal structure analysis. 1 consists of two independent molecules with distorted octahedral structure.
    Notes: Der Titelkomplex 1 wurde durch Addition von 1,2-Bis(dimethylphosphino)ethan an Tetramethyltitan in Diethylether erhalten. Der Komplex wurde 1H-, 13C- und 31P-NMR-spektroskopisch, sowie durch Röntgenkristallstruktur-analyse charakterisiert. 1 tritt in der Elementarzelle in zwei unabhängigen Molekülen mit verzerrt oktaedrischer Konstitution auf.
    Additional Material: 3 Ill.
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  • 2
    ISSN: 0044-2313
    Keywords: Tetramethyltitanium tetrahydrofuran ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Transition Metal Alkyl Compounds. 63. Preparation and Crystal Structure of Tetramethyltitanium TetrahydrofuranMe4Ti · 2THF 1 dissoziates partially in n-pentane. The formed Me4Ti · THF 2 could be isolated. According to X-ray structure determination the molecules of 2 have a trigonalbipyramidal shape with the THF molecule in axial position.
    Notes: Me4Ti · 2THF 1 unterliegt in n-Pentan einer partiellen Dissoziation. Das dabei entstehende Me4Ti · THF 2 konnte isoliert und die Kristallstruktur ermittelt werden. Danach liegen die Moleküle von 2 im Kristall in trigonal-bipyramidaler Form vor, mit dem THF-Molekül in axialer Position.
    Additional Material: 1 Ill.
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  • 3
    ISSN: 0044-2313
    Keywords: Organolanthanoide compounds; ; yttrium ; holmium ; IR ; NMR spectra ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metallorganische Verbindungen der Lanthanoide. LXVI. Synthese und Röntgenstrukturanalyse von [O(CH2CH2C5H4)2Y(μ-OH)]2 und (MeC5H4)3Ho(H2O), zwei ungewöhnlichen Produkten der Hydrolyse von Organolanthanoide-VerbindungenBei der partiellen Hydrolyse von [O(CH2CH2C5H4)2]Y(C5H4CH3) 1, [O(CH2CH2C5H4)2]Y(C5H5) 3, und [O(CH2CH2C5H4)2]Ho(C5H4CH3) 5 bilden sich [O(CH2CH2C5H4)2)Y(μ-OH)]2 2, (C5H5)3Y(OH2) 9 and (MeC5H4)3Ho(OH2) 11. Die neuen Verbindungen wurden durch Elementaranalysen, sowie IR- und NMR-spektroskopisch charakterisiert. Die Röntgenstrukturanalyse ergibt für 2 eine monokline Elementarzelle, Raumgruppe P21/n mit den Gitterkonstanten a = 1146,0(3), b = 1046,6(3), c = 1514,9(3) pm, β = 94,83(2)°. Die Molekülstruktur zeigt verbrückende Hydroxylgruppen, der mittlere Y—O-Abstand beträgt 223,8(3) pm. 11 kristallisiert kubisch in der Raumgruppe I43d mit a = 1847,9(3) pm mit z = 16 Formeleinheiten in der Elementarzelle. Die Moleküle besitzen C3-3 Symmetrie, die Koordination ist trigonal-pyramidal mit einem Wassermolekül und drei Methylcyclopentadienylliganden. Der Abstand Ho—O beträgt 231 pm.
    Notes: The partial hydrolysis of [O(CH2CH2C5H4)2]Y(C5H4CH3) 1, [O(CH2CH2C5H4)2]Y(C5H5)3, and [O(CH2CH2C5H4)2]Ho(C5H4CH3) 5 results in the formation of [O(CH2CH2CH2C5H4)2Y(μ-OH)2]2 2, (C5H5)3Y(OH2) 9 and (MeC5H4)3Ho(OH2) 11. The new compounds have been characterized by elemental analyses, IR and NMR spectra. The X-ray structural analyses shows 2 to be monoclinic, space group P21/n with a = 1146.0(3), b= 1046.6(3), c = 1514.9(3) pm, β = 94.83(2)°. The molecular structure shows bridging hydroxyl groups with a mean distance Y—O = 223.8(3) pm. 11 crystallizes in the cubic space group 143d with a = 1847.9(3)pm with Z = 16 molecules per unit cell. The molecules posses symmetry C3-3, the coordination is trigonal pyramidal with three methylcyclopentadienyl anions and one water molecule as ligands. The distance Ho—O is 231 pm.
    Additional Material: 3 Ill.
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