Formation of a Donor-Stabilized Tetrasilacyclobutadiene Dication by a Lewis Acid Assisted Reaction of anN-Heterocyclic Chloro Silylene,Journal of the American Chemical Society

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Formation of a Donor-Stabilized Tetrasilacyclobutadiene Dication by a Lewis Acid Assisted Reaction of anN-Heterocyclic Chloro Silylene
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2011-06-08 , DOI: 10.1021/ja2033475
Shigeyoshi Inoue ₁ , Jan D. Epping ₁ , Elisabeth Irran ₁ , Matthias Driess ₁

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The first donor-stabilized tetrasilacyclobutadiene dication species has been synthesized and fully characterized. Its unexpected formation occurs by the Lewis acid assisted reaction of the N-heterocyclic chloro silylene [L(Si:)Cl] (L = PhC(NtBu)(2); amidinate) with Cp*ZrCl(3) (Cp* = pentamethylcyclopentadienyl) in the molar ratio of 3:2. Remarkably, the four-membered Si(4) core consists of two N-donor stabilized silylium subunits and two silylene-like moieties. The dicationic charge is somewhat delocalized on the Si(4) core, which is supported by DFT calculations.

中文翻译：

通过 N-杂环氯亚甲硅烷的路易斯酸辅助反应形成供体稳定的四硅杂环丁二烯双阳离子

第一个供体稳定的四硅杂环丁二烯双阳离子物种已被合成并充分表征。通过路易斯酸辅助 N-杂环氯亚甲硅烷 [L(Si:)Cl]（L = PhC(NtBu)(2)；脒）与 Cp*ZrCl(3)（Cp* = 五甲基环戊二烯基) 的摩尔比为 3:2。值得注意的是，四元 Si(4) 核心由两个 N 供体稳定的甲硅烷亚基和两个类甲硅烷基部分组成。双阳离子电荷在 Si(4) 核上有些离域，这得到了 DFT 计算的支持。

更新日期：2011-06-08

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