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Olefin Metathesis Polymerization: Overview

Olefin Metathesis Polymerization: Overview

Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...

Precipitation Reactions

Precipitation Reactions

In a precipitation reaction, aqueous solutions of soluble salts react to give an insoluble ionic compound – the precipitate. The reaction occurs when oppositely charged ions in solution overcome their attraction for water and bind to each other, forming a precipitate that separates out from the solution. Since such reactions involve the exchange of ions between ionic compounds in aqueous solution, they are also referred to as double displacement, double replacement, exchange reactions, or...

SN1 Reaction: Mechanism

S_N1 Reaction: Mechanism

Kinetic studies of ionization of a tertiary halide in a protic solvent suggest that only the substrate participates in the rate-determining step (slow step). The nucleophile is involved only after the slowest step. The SN1 reaction takes place in a multiple-step mechanism.
Firstly, the haloalkane ionizes to generate a carbocation intermediate and a halide ion. This heterolytic cleavage is highly endothermic with large activation energy. The ionization of the substrate, facilitated by a...

Preparation and Reactions of Sulfides

Preparation and Reactions of Sulfides

Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...

Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic SN1

Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic S_N1

Treating arylamines with nitrous acid gives aryldiazonium salts that are effective substrates in nucleophilic aromatic substitution reactions. The diazonio group in these salts can be easily displaced by different nucleophiles, yielding a wide variety of substituted benzenes. The leaving group departs as nitrogen gas, and this easy elimination is the driving force for the substitution reaction.
In the Sandmeyer reaction, for example, the diazonio group is replaced by a chloro, bromo,...

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Related Experiment Video

Updated: May 25, 2025

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

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

Published on: October 18, 2019

Salt Metathesis: An Ultimate Click Reaction.

Christopher M Butch¹, Patrick C Hillesheim², Arsalan Mirjafari¹

¹Department of Chemistry, State University of New York at Oswego, Oswego, New York 13126, United States.

Precision Chemistry

|February 28, 2025

Summary

Salt metathesis, or ion exchange, is proposed as a new click reaction, expanding click chemistry to ionic interactions. This versatile and sustainable method mirrors natural processes and offers broad synthetic applications.

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Last Updated: May 25, 2025

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

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Published on: October 18, 2019

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Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry

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Published on: August 19, 2012

Area of Science:

Chemical Synthesis
Materials Science
Biochemistry

Background:

Click chemistry principles traditionally focus on covalent bond formation.
Nature employs similar reactions, such as ion exchange, in biomineralization.
Existing click reactions are highly efficient but limited in scope.

Purpose of the Study:

To propose salt metathesis as a novel click reaction.
To extend the concept of click chemistry to ionic interactions.
To highlight the potential of ion exchange in synthetic chemistry.

Main Methods:

Conceptual analysis of salt metathesis reactions.
Comparison with established click chemistry criteria.
Exploration of natural biomineralization processes.

Main Results:

Salt metathesis reactions meet the criteria for click chemistry.
These reactions are universal, robust, and proceed under mild conditions.
Minimal waste generation is characteristic of salt metathesis.

Conclusions:

Salt metathesis represents an ultimate click reaction for ionic interactions.
This expands the scope of click chemistry into inorganic and materials science.
Offers new avenues for efficient and sustainable synthesis.