相关实验视频

Updated: Sep 14, 2025

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
09:37

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

Published on: October 18, 2019

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在-多重结合复合体中协同作用的C-H键激活:一连串的转换

Zachary Dubrawski1, Iker Del Rosal2, Erwann Jeanneau3

  • 1Laboratory of Catalysis, Polymerization, Processes and Materials (CP2M UMR 5128), CNRS, Universite Claude Bernard Lyon 1, CPE-Lyon, Institut de Chimie de Lyon 43 Bd du 11 Novembre 1918 F-69616 Villeurbanne France clement.camp@univ-lyon1.fr.

Chemical science
|July 23, 2025
PubMed
概括

这项研究引入了具有多重键的新型-化合物,证明了通过复杂的键断裂和形成级联来激活二氧化碳和异酸盐等小分子的独特反应性.

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Cycloaddition Reactions: MO Requirements for Thermal Activation

Thermal cycloadditions are reactions where the source of activation energy needed to initiate the reaction is provided in the form of heat. A typical example of a thermally-allowed cycloaddition is the Diels–Alder reaction, which is a [4 + 2] cycloaddition. In contrast, a [2 + 2] cycloaddition is thermally forbidden.
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Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
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Properties of Organometallic Compounds

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Structural Isomerism

Isomerism in Complexes
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Radical reactions can occur either intermolecularly or intramolecularly. In an intermolecular radical reaction, a nucleophilic radical adds to an electrophilic alkene or vice versa. In such reactions, the radical and generally the alkene, which is also called the radical trap, are two different molecules. Additionally, for such intermolecular reactions to occur, the radical trap must be active, present in an excess concentration, and the radical starting material must have a weak...
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