Reduction of Na(+) within a {Mg(2) Na(2) } Assembly.

Reduction of Na(+) within a {Mg(2) Na(2) } Assembly.
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DOI:
10.1002/anie.202213670
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发表时间:
2023-01-16
影响因子:
16.6
通讯作者:
Richards, Emma
Richards, Emma
中科院分区:
化学1区
文献类型:
--
作者:
Liu, Han-Ying;Neale, Samuel E.;Hill, Michael S.;Mahon, Mary F.;McMullin, Claire L.;Richards, Emma

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含有钠阳离子的离子化合物因其稳定性和对氧化还原反应性的抗性而引人注目,除非施加高度还原电位。在这里,我们报告了用不可还原的有机碱处理低氧化态的{Mg 2Na 2}物质会诱导钠金属的自发和完全选择性的挤出以及MgI中心氧化为更常规的MgII状态。虽然这些过程的特征还在于最初螯合的二酰胺旁观者配体的结构重组,计算量子化学研究表明,分子内电子转移是教唆的前沿分子轨道(HOMO/LUMO)的{Mg 2Na 2}合奏,这完全是从3s价原子轨道的组成钠和镁原子。用比钠阳离子本身更不易于还原的碱性分子处理低氧化态{Mg 2Na 2}组装体诱导元素碱金属的完全挤出。
Ionic compounds containing sodium cations are notable for their stability and resistance to redox reactivity unless highly reducing electrical potentials are applied. Here we report that treatment of a low oxidation state {Mg2Na2} species with non‐reducible organic bases induces the spontaneous and completely selective extrusion of sodium metal and oxidation of the MgI centers to the more conventional MgII state. Although these processes are also characterized by a structural reorganisation of the initially chelated diamide spectator ligand, computational quantum chemical studies indicate that intramolecular electron transfer is abetted by the frontier molecular orbitals (HOMO/LUMO) of the {Mg2Na2} ensemble, which arise exclusively from the 3s valence atomic orbitals of the constituent sodium and magnesium atoms. Treatment of a low oxidation state {Mg2Na2} assembly with basic molecules that are less prone to reduction than the sodium cation itself induces the complete extrusion of the elemental alkali metal.
DOI: 10.1080/00958979808047191
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