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The reversible synthesis of bis(quinuclidine) alane

机译:双(奎宁环烷)铝烷的可逆合成

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Aluminum hydride is a material that is well known for its high gravimetric and volumetric hydrogen den?sities and thus is an attractive hydrogen storage compound; however, it is thermodynamically unstable at room temperature requiring 7 x 103 bar pressure to reform the hydride from Al and H_2. An alternate method of AlH_3 formation is possible using a reversible organometallic synthesis employing catalyzed Al powder, H_2, and quinuclidine, or another tertiary amine, as an intermediate step. Additionally, many tertiary amines are known to react directly with AlH_3 to form adducts. Previous work indicates that two polymorphs of quinuclidine alane exist, formed using an irreversible process that requires expensive starting materials (e.g. LiAlH_4). The conditions of reversible adduct formation are detailed herein, as well as an analysis of quinuclidine alane by Fourier transform infrared spectroscopy and X-ray diffraction.
机译:氢化铝是一种以高重量和体积氢密度而著称的材料,因此是一种有吸引力的储氢化合物。但是,它在室温下是热力学不稳定的,需要7 x 103 bar的压力才能从Al和H_2重整氢化物。使用可逆的有机金属合成作为中间步骤,可以使用可逆的有机金属合成方法,该方法采用催化的Al粉,H_2和奎宁环或另一种叔胺。另外,已知许多叔胺可直接与AlH_3反应形成加合物。先前的工作表明存在奎宁环烷烷烃的两种多晶型物,它们是通过不可逆的过程形成的,该过程需要昂贵的起始原料(例如LiAlH_4)。可逆加合物形成的条件以及通过傅立叶变换红外光谱法和X射线衍射对奎尼丁烷的分析都在本文中进行了详细描述。

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