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    Novel solid-state synthesis of halide free alane

    Access Status
    Fulltext not available
    Authors
    Knight, D.
    Dinh, L.
    Paskevicius, M.
    Buckley, Craig
    Zidan, R.
    Date
    2012
    Type
    Conference Paper
    
    Metadata
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    Citation
    Knight, D. and Dinh, L. and Paskevicius, M. and Buckley, C. and Zidan, R. 2012. Novel solid-state synthesis of halide free alane, in Proceedings of the 244th National Meeting of the American-Chemical-Society (ACS), Aug 19-23 2012, Philadelphia, Pennsylvania: ACS.
    Source Title
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
    Source Conference
    244th National Fall Meeting of the American-Chemical-Society (ACS)
    ISSN
    0065-7727
    School
    Department of Physics and Astronomy
    URI
    http://hdl.handle.net/20.500.11937/36124
    Collection
    • Curtin Research Publications
    Abstract

    The traditional aluminum hydride (alane, AlH3) synthesis involves reacting AlCl3 and LiAlH4 in diethyl ether, resulting in the formation of the alane etherate adduct, AlH3·h[(C2H5)2O]. The desired crystallized, stable a-AlH3 can only be obtained by either extensive vacuum distillation and heating of the etherate or by a crystallization process involving a large, heated bath of a benzene/toluene solution. These processes tend to be costly due to the several hours of vacuum pumping and/or heating required as well as dangerously using large amounts of flamable, toxic solvents. It is demonstrated here that a-AlH3 can be obtained by simply mixing AlCl3 and LiAlH4 in the solid state and slowly heating to 75° C. The a-AlH3 product can be washed with minimal solvents to remove the LiCl bi-product, leading to zero formation of any alane adducted materials. Although simple mixing and heating the reactants can provide a 40% yield of alane, the application of moderate pressure while heating increases this yield to over 60 % of cvrystalline a-AlH3.

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