Cleavage of the N≡N Triple Bond and Unpredicted Formation of the Cyclic 1,3-Diaza-2,4-Diborete (FB)(2) N(2) from N(2) and Fluoroborylene BF.

Cleavage of the N≡N Triple Bond and Unpredicted Formation of the Cyclic 1,3-Diaza-2,4-Diborete (FB)(2) N(2) from N(2) and Fluoroborylene BF.
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N N 三键的断裂以及 N-2 和氟硼烯 BF 意外形成环状 1,3-二氮杂-2,4-二硼酸 (FB)(2)N-2

DOI:
10.1002/anie.202106984
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发表时间:
2021-07-26
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Riedel S
Riedel S
中科院分区:
其他
文献类型:
--
作者:
Xu B;Beckers H;Ye H;Lu Y;Cheng J;Wang X;Riedel S

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氟硼炔(BF)在低温N2基体中完全裂解了N2的三键,形成了四元杂环FB(μ - N)2BF,缺乏跨环N - N键。此外,还形成了线性络合物FB=N−N=BF和循环FB(η 2‐N2)。这些新物种通过它们的矩阵红外光谱和量子化学计算进行了表征。皱化的四元环B2N2配合物显示出与外环氟π孤对共轭的离域芳香双电子π体系。本研究为合理设计以硼为原料的人工二氮活化催化剂提供了理论依据。四元杂环FB(μ N)2BF是由氟硼炔、FB和N2合成的。它显示了N2三键的完全断裂和一个离域的芳香双电子π键与外环氟π孤对共轭,表明氟特异性相互作用的重要性。
A complete cleavage of the triple bond of N2 by fluoroborylene (:BF) was achieved in a low‐temperature N2 matrix by the formation of the four‐membered heterocycle FB(μ‐N)2BF, which lacks a trans‐annular N−N bond. Additionally, the linear complex FB=N−N=BF and cyclic FB(η 2‐N2) were formed. These novel species were characterized by their matrix infrared spectra and quantum‐chemical calculations. The puckered four‐membered‐ring B2N2 complex shows a delocalized aromatic two‐electron π‐system in conjugation with the exo‐cyclic fluorine π lone pairs. This work may contribute to a rational design of catalysts based on borylene for artificial dinitrogen activation. The four‐membered heterocycle FB(μ‐N)2BF is obtained from fluoroborylene, FB, and N2. It shows a complete cleavage of the N2 triple bond and a delocalized aromatic two‐electron π‐bond conjugated with the exo‐cyclic fluorine π lone pairs, indicating the importance of fluorine‐specific interactions.
DOI: 10.1039/c6ra03246j
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期刊: RSC ADVANCES
影响因子: 3.9
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