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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1371-1383 
    ISSN: 0009-2940
    Keywords: Magnesium hydride, catalytically prepared ; Hydromagnesation reactions ; Magnesium, diorgano compounds, preparation from magnesium, hydrogen and 1-alkenes ; Magnesium, diorgano compounds, application in syntheses ; Magnesium, diorgano compounds, oxidation of ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1-Alkenes are converted in high yields to the corresponding primary diorganomagnesium compounds by transition metalcatalyzed hydromagnesation reaction using catalytically prepared suspended (MgH2*) or dissolved magnesium hydride (MgH2*). The most active hydromagnesation catalysts have been found to be combinations of zirconium tetrahalides with MgH2* or MgH2*. The reaction is highly regio-and chemoselective. The diorganomagnesium compounds prepared in situ from magnesium, hydrogen, and 1-alkenes can be applied to the synthesis of organic and organometallic compounds just as Grignard compounds (Scheme 3, reaction 3-11). Dioctylmagnesium undergoes the growth reaction with ethene in the presence of quinuclidine and is oxidized by molecular oxygen in high yield to 1-octanol.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1041-1050 
    ISSN: 0009-2940
    Keywords: Magnesium, catalytic hydrogenation of ; Magnesium hydride, soluble, IR spectrum of ; Magnesium hydride-quinuclidine complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Upon hydrogenation of magnesium in THF using homogeneous magnesium-anthracene transition-metal halide catalysts in the presence of small amounts of MgCl2 and solubilizing agents L, a dissolved form of magnesium hydride (MgH'2) is produced. The preferred L's are quinuclidine (QC) or organomagnesium compounds; however, organoaluminium and -boron compounds can also be used. The fraction n of magnesium hydride produced in the dissolved form and the stability of the MgH'2 solutions are investigated as a function of the kind and the amount of solubilizing agents and catalysts. The optimized method for the preparation of MgH'2 is described. The magnesium hydride dissolved in THF is characterized by IR spectroscopy. In order to elucidate the role of the solubilizing agents, THF-soluble MgCl2-containing stoichiometric MgH2 · QC model complexes are also prepared and characterized by IR spectra. Advantages and disadvantages of using MgH'2 for synthetic purposes instead of catalytically prepared suspensions of magnesium hydride (MgH2) are discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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