易于NN的Cis-Azobenzene与Bis-silylenes的纽带裂解
Yun Xiong1, Shenglai Yao1, Matthias Driess1
1Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin, Strasse des 17. Juni 115, Sekr. C2, 10623, Berlin, Germany.
Angewandte Chemie (International ed. in English)
|April 28, 2025
概括
这项研究揭示了合作性disilicon(II) bis-silylenes如何选择性地激活亚博烯异构体中的NN键. 不同的双烯结构导致不同的反应途径和产品,包括新的NN键裂解化合物.
科学领域:
- 有机金属化学 有机金属化学
- 化学 化学
- 催化剂是一种催化剂.
背景情况:
- -双键 (NN) 在各种化学转化中至关重要.
- 亚二同体 (cis 和 trans) 具有不同的反应性.
- (II) 化合物,特别是 bis-silylenes,正在成为用于键激活的多功能试剂.
研究的目的:
- 通过两个不同的二 (II) 二二烯来研究cis-和trans-azobenzene的合作性NN键激活.
- 阐明双烯结构,特别是Si··Si距离对反应结果的影响.
- 探索新的反应途径并描述新的-化合物.
主要方法:
- 合成和表征两个具有不同分子内Si··Si距离的bis-silylenes.
- 这些bis-silylenes在不同的条件下与trans-和cis-azobenzene发生反应.
- 反应中间体和产品的隔离和结构确定.
- 密度函数理论 (DFT) 计算以支持机械学的见解.
主要成果:
- 转二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二三二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二三二二二二二二二二二二二二二二二二二二二二二二二二
- 西斯-亚二烯完全经历NN键裂变.
- 从cis-azobenzene与一个bis-silylene的反应中获得了一种具有终端和桥梁SiN部分的新型bis-silaimine产品.
- 一个 [1+2] 循环添加中间体 (siladiazirane) 和随后的重组产物与其他 bis-silylene 和 cis-azobenzene 被观察到.
- DFT计算证实了合作的Si (II) ···Si (II) 激活机制.
结论:
- 在 bis-silylenes 中,分子内Si··Si 距离在控制 azobenzenes 中 NN 键激活的选择性方面发挥着至关重要的作用.
- 双二烯为选择性NN键裂解反应提供了一个强大的平台.
- 这项研究为化学中的合作机制以及新型-化合物的合成提供了新的见解.
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