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Related Concept Videos

Cycloaddition Reactions: Overview01:16

Cycloaddition Reactions: Overview

3.0K
Cycloadditions are one of the most valuable and effective synthesis routes to form cyclic compounds. These are concerted pericyclic reactions between two unsaturated compounds resulting in a cyclic product with two new σ bonds formed at the expense of π bonds. The [4 + 2] cycloaddition, known as the Diels–Alder reaction, is the most common. The other example is a [2 + 2] cycloaddition.
3.0K
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction01:16

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

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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.
11.2K
Pericyclic Reactions: Introduction01:17

Pericyclic Reactions: Introduction

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Pericyclic reactions are organic reactions that occur via a concerted mechanism without generating any intermediates. The reactions proceed through the movement of electrons in a closed loop to form a cyclic transition state, where rearrangement of the σ and π bonds yields specific products.
Pericyclic reactions can be classified into three categories: electrocyclic reactions, cycloaddition reactions, and sigmatropic rearrangements. Electrocyclic reactions and sigmatropic...
8.8K
Synthesis and Decomposition Reactions02:17

Synthesis and Decomposition Reactions

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Synthesis and decomposition are two types of redox reactions. Synthesis means to make something, whereas decomposition means to break something. The reactions are accompanied by chemical and energy changes. 
37.0K
Diels–Alder Reaction Forming Cyclic Products: Stereochemistry01:28

Diels–Alder Reaction Forming Cyclic Products: Stereochemistry

4.3K
The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.
4.3K
Cycloaddition Reactions: MO Requirements for Thermal Activation01:16

Cycloaddition Reactions: MO Requirements for Thermal Activation

3.9K
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.
3.9K

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Related Experiment Video

Updated: Nov 8, 2025

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
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The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes

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Synthetic reactions driven by electron-donor-acceptor (EDA) complexes.

Zhonglie Yang1, Yutong Liu1, Kun Cao1

  • 1School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.

Beilstein Journal of Organic Chemistry
|April 23, 2021
PubMed
Summary
This summary is machine-generated.

Electron-donor-acceptor (EDA) complexes form weak aggregates that initiate reactions upon light exposure. This review covers recent synthetic reactions and mechanisms involving EDA complexes, highlighting their green chemistry applications.

Keywords:
EDA complexelectron acceptorelectron donorradicalvisible light

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Area of Science:

  • Organic Chemistry
  • Photochemistry
  • Green Chemistry

Background:

  • Electron-donor-acceptor (EDA) complexes are reversible, weak ground-state aggregates formed by dipole-dipole interactions.
  • Upon light irradiation, EDA complexes transition to an excited state, facilitating electron transfer and radical formation to initiate reactions.

Purpose of the Study:

  • To review synthetic reactions involving EDA complexes.
  • To discuss the mechanisms of EDA complex-mediated reactions over the past five years.
  • To highlight the green chemistry aspects of EDA complex-driven reactions.

Main Methods:

  • Literature review of synthetic reactions and mechanisms.
  • Analysis of studies published within the last five years.
  • Focus on reactions utilizing EDA complexes.

Main Results:

  • EDA complexes can initiate various synthetic transformations via photoinduced electron transfer.
  • Many EDA complex-involved reactions proceed under mild conditions.
  • These reactions often obviate the need for transition metal catalysts or photosensitizers, aligning with green chemistry principles.

Conclusions:

  • EDA complexes are versatile intermediates in organic synthesis.
  • Their ability to undergo photoinduced electron transfer enables novel reaction pathways.
  • EDA complex chemistry offers sustainable and environmentally friendly synthetic methodologies.