Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Colors and Magnetism03:02

Colors and Magnetism

Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Properties of Transition Metals02:58

Properties of Transition Metals

Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
Oxidation of Phenols to Quinones01:17

Oxidation of Phenols to Quinones

In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

Oxidation–Reduction Reactions

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Formation Pathways of an Electrophilic μ-1,2-Peroxo Fe<sup>III</sup>Fe<sup>III</sup> Complex: Spectroscopic Characterization and Reactivity.

Journal of the American Chemical Society·2026
Same author

Elucidating decay pathways of bispidine-iron(IV)-tosylimido complexes: insights gained from decay products.

Dalton transactions (Cambridge, England : 2003)·2025
Same author

Putative O-O Bond Formation in the Coordination Sphere of a Bispidine-Iron(IV)-Oxido Complex.

Inorganic chemistry·2025
Same author

Unexpected bonding ambiguity of the open/closed-shell R<sub>2</sub>PO ligand family: the case of phosphinoyl <i>vs.</i> phosphoryl if bound to transition metals in their low oxidation state.

Dalton transactions (Cambridge, England : 2003)·2025
Same author

Modelling the binding of cytotoxic dinuclear nickel complexes to two neighboring phosphate esters of DNA using dicarboxylate ligands.

Dalton transactions (Cambridge, England : 2003)·2025
Same author

Support for the Anticipated Binding Mode of a Cytotoxic Dinuclear Copper Complex to Two Neighboring Phosphate Esters of the DNA Backbone.

Inorganic chemistry·2025

Related Experiment Video

Updated: Jun 22, 2026

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyl(tropone)iron
07:56

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyl(tropone)iron

Published on: August 12, 2019

Highly oxidized diiron complexes: generation, spectroscopy, and stabilities.

Julia Bernhardette Hildegard Strautmann1, Carl-Georg Freiherr von Richthofen, Serena DeBeer George

  • 1Fakultät für Chemie, Universität Bielefeld, 33615, Bielefeld, Germany.

Chemical Communications (Cambridge, England)
|June 18, 2009
PubMed
Summary

Oxidation of iron complexes generates radical species. These intermediates rapidly decay, forming highly reactive monomeric iron-oxygen species, crucial for understanding iron chemistry.

More Related Videos

Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
10:01

Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase

Published on: December 4, 2017

Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry
12:08

Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry

Published on: March 18, 2012

Related Experiment Videos

Last Updated: Jun 22, 2026

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyl(tropone)iron
07:56

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyl(tropone)iron

Published on: August 12, 2019

Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
10:01

Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase

Published on: December 4, 2017

Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry
12:08

Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry

Published on: March 18, 2012

Area of Science:

  • Inorganic Chemistry
  • Bioinorganic Chemistry
  • Oxidation Reactions

Background:

  • Diferric complexes are key intermediates in various biological and chemical processes.
  • Understanding the reactivity and decay pathways of oxidized iron complexes is essential.

Purpose of the Study:

  • To investigate the oxidation and subsequent decay of a specific diferric complex.
  • To identify the reactive species formed during the decay process.

Main Methods:

  • Electrochemical oxidation of the diferric complex.
  • Spectroscopic characterization of reaction intermediates and products.

Main Results:

  • Oxidation yielded monoradical and diradical species.
  • These radical species decayed into monomeric complexes.
  • A highly reactive putative iron(IV)-oxo species, [LFe(IV)=O], was identified.

Conclusions:

  • The study elucidates the complex reactivity of oxidized diferric complexes.
  • The formation of reactive iron(IV)-oxo species is a significant pathway in iron chemistry.
  • This research provides insights into potential mechanisms in iron-containing enzymes.