Related Experiment Video
Updated: Jun 25, 2026
12:08
Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry
Published on: March 18, 2012
Nanosecond redox equilibrium method for determining oxidation potentials in organic media
Gonzalo Guirado1, Cavan N Fleming, Thor G Lingenfelter
1Department of Chemistry and the Center for Photoinduced Charge Transfer, University of Rochester, Rochester, New York 14627-0216, USA.
Journal of the American Chemical Society
|October 28, 2004
Summary
A new nanosecond equilibrium method precisely determines oxidation potentials for reactive organic compounds. This technique, using redox ladders, accurately measures potentials for aryl-alkylcyclopropanes, revealing structure-property trends.
Area of Science:
- Electrochemistry
- Organic Chemistry
- Physical Chemistry
Background:
- Determining oxidation potentials for reactive organic compounds is challenging.
- Existing methods often lack precision and accuracy for highly reactive cation radicals.
Purpose of the Study:
- To develop a general, high-precision method for measuring oxidation potentials in organic media.
- To accurately determine oxidation potentials for compounds forming reactive cation radicals.
- To investigate structure-property relationships of aryl-alkylcyclopropanes.
Main Methods:
- A nanosecond equilibrium method utilizing redox ladders in organic solvents (dichloromethane, acetonitrile).
- Establishing electron-transfer equilibria between reference compounds and analytes.
- Applying the method to a series of aryl-alkylcyclopropanes.
Main Results:
- The method provides thermodynamically meaningful oxidation potentials with high precision and accuracy.
- Successfully determined previously imprecisely known oxidation potentials for aryl-alkylcyclopropanes.
- Identified and discussed structure-property trends for the cyclopropane series.
Conclusions:
- The developed nanosecond equilibrium method is effective for precise oxidation potential determination.
- The method is applicable to compounds forming highly reactive cation radicals.
- New insights into the oxidation behavior and structure-property relationships of aryl-alkylcyclopropanes were gained.
More Related Videos
Related Concept Videos
01:24Redox Reactions
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
03:11Oxidation-Reduction Reactions
Oxidation–Reduction Reactions
02:58Balancing Redox Equations
Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
01:19Oxidation and Reduction of Organic Molecules
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
The removal of an electron from a molecule, results in a...
01:23Redox Equilibria: Overview
A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
01:26Redox Titration: Other Oxidizing and Reducing Agents
Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...