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Updated: Nov 9, 2025

Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups
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Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups

Published on: February 11, 2012

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新型Ge2和Ge4组件通过碳酸二二烯连接物稳定

Yun Xiong1, Dandan Chen2, Shenglai Yao1

  • 1Metalorganics and Inorganic Materials, Department of Chemistry, Technische Universität Berlin, Straße des 17, Juni 135, Sekr. C2, 10623 Berlin, Germany.

Journal of the American Chemical Society
|April 14, 2021
PubMed
概括

通过独特的碳-连体支持的新型(0) -(II) 和(4) 集群的合成已经实现. 这些发现为集化学和结合提供了新的见解.

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Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

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The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
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This lesson delves into the geometry of a radical, which is influenced by the electronic structure of the molecule. The principle is similar to that of a lone pair, where the unpaired electron influences the geometry at the radical center.
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VSEPR Theory for Determination of Electron Pair Geometries
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