N-H Bond Formation at a Diiron Bridging Nitride.

N-H Bond Formation at a Diiron Bridging Nitride.
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在二铁桥氮化物上形成N-H键。

DOI:
10.1002/anie.202006391
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发表时间:
2020-08-24
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Tomson NC
Tomson NC
中科院分区:
其他
文献类型:
--
作者:
Zhang S;Cui P;Liu T;Wang Q;Longo TJ;Thierer LM;Manor BC;Gau MR;Carroll PJ;Papaefthymiou GC;Tomson NC

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尽管它们与氨合成有关,但人们对铁结合的桥接氮化物形成N-H键的能力知之甚少。在这里,我们报告了一个线性二铁桥氮化物配合物支持的氧化还原活性大环。发现配体支架适应桥连物质的几何偏好的独特能力有助于通过质子偶联电子转移形成N-H键以产生μ-酰胺产物。结构类似的μ-甲硅烷基-和μ-硼酰胺配合物被证明是由氮化物净插入到E-H键(E = B,Si)中形成的。质子化的父桥接酰胺产生氨在高产率,和处理的氮化物与PhSH被发现释放NH3在高产率通过反应,从事的配体在PCET的氧化还原活性。
Despite their connection to ammonia synthesis, little is known about the ability of iron-bound, bridging nitrides to form N–H bonds. Herein we report a linear diiron bridging nitride complex supported by a redox-active macrocycle. The unique ability of the ligand scaffold to adapt to the geometric preference of the bridging species was found to facilitate the formation of N–H bonds via proton-coupled electron transfer to generate a μ-amide product. The structurally analogous μ-silyl- and μ-borylamide complexes were shown to form from the net insertion of the nitride into the E–H bonds (E = B, Si). Protonation of the parent bridging amide produced ammonia in high yield, and treatment of the nitride with PhSH was found to liberate NH3 in high yield through a reaction that engages the redox-activity of the ligand during PCET.
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影响因子: 4.6
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