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Related Concept Videos

Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

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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...
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Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

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Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
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Oxidative Cleavage of Alkenes: Ozonolysis01:46

Oxidative Cleavage of Alkenes: Ozonolysis

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In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
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Catalysis02:50

Catalysis

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The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
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Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

12.5K
Alkenes can be dihydroxylated using potassium permanganate.  The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
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Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.4K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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Related Experiment Video

Updated: Aug 19, 2025

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
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Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction

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Metamorphic oxygen-evolving molecular Ru and Ir catalysts.

Nataliia Vereshchuk1,2, Marcos Gil-Sepulcre1, Abolfazl Ghaderian1,2

  • 1Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avda. Països Catalans 16, 43007 Tarragona, Spain. allobet@iciq.cat.

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Summary

Researchers review ruthenium complexes as water oxidation catalysts (WOCs) for clean energy. Understanding key factors like ligand flexibility and proton-coupled electron transfer is crucial for efficient, robust catalysts.

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Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
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The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
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Area of Science:

  • Inorganic Chemistry
  • Catalysis
  • Renewable Energy

Background:

  • Sustainable energy strategies mimic natural photosynthesis, using sunlight and water for proton and electron generation.
  • Efficient water oxidation requires catalysts that facilitate the four-proton, four-electron process to produce molecular oxygen.
  • The thermodynamic and mechanistic complexity of water oxidation presents challenges in discovering effective catalysts.

Purpose of the Study:

  • To review the catalytic performance of ruthenium coordination complexes as water oxidation catalysts (WOCs).
  • To identify and analyze factors influencing the performance of these WOCs during catalysis.
  • To provide a comprehensive understanding of the chemistry governing catalytic water oxidation.

Main Methods:

  • Review of existing literature on ruthenium-based water oxidation catalysts.
  • Focus on catalysts with detailed mechanistic investigations.
  • Analysis of structure-activity relationships and mechanistic pathways.

Main Results:

  • Ruthenium complexes are among the best-understood WOCs.
  • Key factors influencing catalytic performance include stability of Ru-O bonds, coordination number changes, ligand flexibility, proton transfer, and supramolecular effects.
  • Detailed mechanistic studies reveal critical features for efficient water oxidation.

Conclusions:

  • Understanding the interplay of electronic and structural factors is essential for designing efficient and robust water oxidation catalysts.
  • Ruthenium complexes offer valuable insights into the complex chemistry of water oxidation.
  • This collective knowledge aids in developing advanced catalysts for clean energy conversion.