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Oxidation, Coordination, and Nickel-Mediated Deconstruction of a Highly Electron-Rich Diboron Analogue of 1,3,5-Hexatriene.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-05-25 , DOI: 10.1002/anie.202006131
Alexander Hermann 1 , Felipe Fantuzzi 1, 2 , Merle Arrowsmith 1 , Theresa Zorn 1 , Ivo Krummenacher 1 , Benedikt Ritschel 1 , Krzysztof Radacki 1 , Bernd Engels 2 , Holger Braunschweig 1
Affiliation  

The reductive coupling of an N‐heterocyclic carbene (NHC) stabilized (dibromo)vinylborane yields a 1,2‐divinyldiborene, which, although isoelectronic to a 1,3,5‐triene, displays no extended π conjugation because of twisting of the C2B2C2 chain. While this divinyldiborene coordinates to copper(I) and platinum(0) in an η2‐B2 and η4‐C2B2 fashion, respectively, it undergoes a complex rearrangement to an η4‐1,3‐diborete upon complexation with nickel(0).

中文翻译:

1,3,5-己三烯的高电子富集二硼类似物的氧化、配位和镍介导的解构。

N-杂环卡宾 (NHC) 稳定的(二溴)乙烯基硼烷的还原偶联产生 1,2-二乙烯基二硼烯,尽管它与 1,3,5-三烯等电子,但由于 C 的扭曲而没有表现出扩展的 π 共轭2 B 2 C 2链。虽然这种二乙烯基二硼烯分别以 η 2 ‐B 2和 η 4 ‐C 2 B 2方式与铜 (I) 和铂 (0) 配位,但它在络合后会经历复杂的重排,形成 η 4 ‐1,3-二硼烯含镍(0)。
更新日期:2020-05-25
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