Bashkurov Roman, Fridman Natalia, Bravo-Zhivotovskii Dmitry, Apeloig Yitzhak
Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 32000, Israel.
Chemistry. 2023 Dec 11;29(69):e202302678. doi: 10.1002/chem.202302678. Epub 2023 Oct 20.
The tetrasilyl-substituted distannene, (tBu HSi) Sn=Sn(SiHtBu ) 6, was synthesized by mild thermolysis (70 °C in hexane) of tris(di-tert-butyl-hydridosilyl)stannane 4. The X-ray crystallography structure of 6 reveals the following unusual structural properties: a planar geometry around both Sn atoms (Σ∡Sn=359.87°), a non-twisted Sn=Sn double bond, and the shortest Sn=Sn double bond of 2.599 Å among all acyclic distannenes. Thus, compound 6 is the first reported distannene having a structure closely analogous to a classic alkene. Reactions of 6 with CCl or with 2,3-dimethylbuta-1,3-diene to produce 1,2-dichlorodistannane 9 and the [2+4] cycloadduct 10, respectively, are characteristic for a Sn=Sn double bond.
通过三（二叔丁基氢硅基）锡烷4在温和条件下热解（在己烷中70°C）合成了四硅基取代的二锡烯（tBu HSi）Sn=Sn（SiHtBu ）6。6的X射线晶体学结构显示出以下不寻常的结构特性：两个Sn原子周围均为平面几何结构（Σ∡Sn=359.87°），Sn=Sn双键无扭曲，并且在所有无环二锡烯中其Sn=Sn双键最短，为2.599 Å。因此，化合物6是首个报道的结构与经典烯烃极为相似的二锡烯。6与CCl或与2,3 - 二甲基丁二烯 - 1,3 - 二烯反应分别生成1,2 - 二氯二锡烷9和[2 + 4]环加成产物10，这些都是Sn=Sn双键的特征反应。
