A Silylene-Germylene Molecule Containing a SiI -GeI Single Bond.,Chemistry - A European Journal

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A Silylene-Germylene Molecule Containing a SiI -GeI Single Bond.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2020-05-08 , DOI: 10.1002/chem.202000836
Yingying Qin ₁ , Gang Zheng ₂ , Yan Guo ₁ , Fangfang Gao ₁ , Jiani Ma ₁ , Wei Sun ₁ , Gang Xie ₁ , Sanping Chen ₁ , Yaoyu Wang ₁ , Huaming Sun ₃ , Anyang Li ₁ , Wenyuan Wang ₁

Affiliation

The first isolable silylene-germylene complex 5 was assembled by a salt metathesis reaction between the germylene anion 3 and the N-heterocyclic chlorosilylene 4, and structurally characterized. The central structure of 5 demonstrates a remarkable gauche-bent geometry with the silylene and germylene units, which are interconnected by a Si-Ge bond with a length of 2.4498(9) Å. This value is not only perceptibly longer than the distances known in doubly bonded germasilenes, and also slightly longer than those in germylsilanes. The DFT calculations on 5 confirmed a nearly nonpolar SiI -GeI single-bond nature and its bonding orbital, as well as the aromaticity of the C3 NGe-rings in 3 and 5. The latter increases the molecular stability of 3 and 5, and makes the preparation of silylene-germylene complex 5 a reality.

中文翻译：

含有SiI-GeI单键的甲硅烷基-亚锗烯分子。

第一可分离的亚甲硅基-亚锗基络合物5通过在亚二甲基亚烷基阴离子3和N-杂环氯亚甲硅烷基4之间的盐复分解反应组装，并进行结构表征。5的中心结构显示出显着的薄纱弯曲几何形状，其中亚甲硅烷基和亚二甲基亚砜单元通过长度为2.4498（9）的Si-Ge键互连。该值不仅明显长于双键胚芽中已知的距离，而且略长于胚芽硅烷中的已知距离。对5的DFT计算证实了几乎非极性的SiI-GeI单键性质及其键合轨道，以及3和5中C3 NGe环的芳香性。后者增加了3和5的分子稳定性，并使得制备甲硅烷基-亚甲基complex络合物5个现实。

更新日期：2020-02-19

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