摘要/Abstract

碱土金属（Mg，Ca，Sr，Ba）越来越引起大家的兴趣，这是由于它们价格低廉、无毒，可以替代许多有机催化和化学计量反应中昂贵的过渡金属.随着碱土金属离子半径的增大（Mg²⁺2+2+2+），碱土金属有机氢化物的离子性以及键长增加，键能降低，相应的金属氢化物更易发生Schlenk重排生成不溶无机盐[AeH₂]_∞（Ae=Mg，Ca，Sr，Ba），限制了其发展.近年来，人们通过选择合适的配体，合成并表征了一系列碱土金属有机氢化物，择优研究了它们与小分子的有机反应.碱土金属有机氢化物研究的最新进展将被详细介绍.
关键词: 碱土金属, 金属氢化物, 反应性, 研究进展
Alkaline-earth metals continue to receive growing interest, as they are used as low-cost and non-toxic alternatives to transition-metals in various organic transformations. As ionic character and bond lengths increase along the row in the order Mg²⁺2+2+2+, bond energies decrease along the same row, the corresponding metal hydrides are apt to the formation of insoluble metal hydrides[AeH₂]_∞ (Ae=Mg, Ca, Sr, Ba) through Schlenk equilibrium in solution. Recently, a series of alkaline-earth metal hydrides stabilized by suitable ligands were discovered and characterized, and stoichiometric and catalytic reactions with small molecules were studied as well. In this paper, the recent progress in molecular alkaline-earth metal hydrides is reviewed.
Key words: alkaline-earth metals, metal hydride, reactivity, research progress


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