Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Cycloaddition Reactions: MO Requirements for Thermal Activation

Cycloaddition Reactions: MO Requirements for Thermal Activation

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.

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 of a...

Radical Reactivity: Concentration Effects

Radical Reactivity: Concentration Effects

In a radical reaction, the concentration of starting materials governs the selectivity of a radical. For example, the reaction between an alkyl halide and an alkene, in the presence of tin hydride and AIBN, begins with the generation of a tin radical. The generated radical then abstracts halogen from the alkyl halide, producing an alkyl radical. This alkyl radical can either react with tin hydride, yielding an alkane, or add to an alkene, generating a nitrile-stabilized radical, eventually...

Radical Reactivity: Intramolecular vs Intermolecular

Radical Reactivity: Intramolecular vs Intermolecular

Radical reactions can occur either intermolecularly or intramolecularly. In an intermolecular radical reaction, a nucleophilic radical adds to an electrophilic alkene or vice versa. In such reactions, the radical and generally the alkene, which is also called the radical trap, are two different molecules. Additionally, for such intermolecular reactions to occur, the radical trap must be active, present in an excess concentration, and the radical starting material must have a weak carbon–halogen...

Alkenes via Reductive Coupling of Aldehydes or Ketones: McMurry Reaction

Alkenes via Reductive Coupling of Aldehydes or Ketones: McMurry Reaction

The radical dimerization of ketones or aldehydes gives vicinal diols through a pinacol coupling reaction. However, the behavior of titanium metals used for the reaction as a source of electrons is unusual. When the reaction is carried out in the presence of titanium, diols can be isolated at low temperatures. Else titanium further reacts with diols, forming alkenes through the McMurry reaction.

Radical Reactivity: Nucleophilic Radicals

Radical Reactivity: Nucleophilic Radicals

Radicals adjacent to electron-donating groups are called nucleophilic radicals. These radicals readily react with electrophilic alkenes. The SOMO–LUMO interactions are the driving force for the reaction, where the high-energy SOMO of the electron-rich, nucleophilic radicals interacts with the low-energy LUMO of the electron-deficient, electrophilic alkenes. Such SOMO–LUMO interactions are the basis of reactive radical traps, affecting the selectivity in radical reactions. For instance, consider...

You might also read

Related Articles

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

Sort by

Same author

Multi-omics profiling reveals antagonistic strategies of endophytic Streptomyces sp. MEPP0209 against Lasiodiplodia theobromae causing Dendrobium officinale stem rot.

Applied microbiology and biotechnology·2026

Same author

Retrospective non-target screening reveals the occurrence and environmental risk of pharmaceutical transformation products in the Pearl River Basin.

Environment international·2026

Same author

Emerging contaminants shift the rare biosphere, decoupling microbial co-occurrence network complexity from stability in activated sludge from urban wastewater treatment plants.

Journal of hazardous materials·2026

Same author

Breaking Mass-Transfer Limits with an Innovative Spacer Design for Ultrafast Water Desalination.

Environmental science & technology·2026

Same author

Tourist value co-creation behavior in immersive cultural tourism spaces: a case study of "the longest day in chang'an".

Frontiers in psychology·2026

Same author

Intelligent design breaks the trade-off between energy efficiency and water flux in ultrafast seawater desalination.

Innovation (Cambridge (Mass.))·2026

Search research articles

Related Experiment Video

Updated: Jun 29, 2026

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

Reactivity Studies on the Terminal Thorium Imido Metallocene (η⁵-C₅Me₅)₂Th(═Ndipp)(dmap).

Yi Heng¹, Xiaoying Cao¹, Wanjian Ding¹

¹Department of Chemistry, Beijing Normal University, Beijing 100875, China.

Inorganic Chemistry

|June 28, 2026

Summary

This study synthesizes a terminal thorium imido metallocene, (η⁵-C₅Me₅)₂Th(═Ndipp)(dmap), which exhibits broad reactivity in small molecule activation. The research highlights how ligand substituents influence the reactivity of these thorium complexes.

More Related Videos

Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization

Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization

Published on: November 29, 2018

Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions

Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions

Published on: March 20, 2014

Related Experiment Videos

Last Updated: Jun 29, 2026

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization

Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization

Published on: November 29, 2018

Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions

Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions

Published on: March 20, 2014

Area of Science:

Organometallic Chemistry
Thorium Chemistry
Catalysis

Background:

Thorium metallocenes are versatile organometallic compounds.
Terminal imido thorium complexes are of interest for their unique reactivity.
Understanding ligand effects is crucial for designing new catalysts.

Purpose of the Study:

To synthesize a novel terminal thorium imido metallocene.
To investigate the reactivity of this complex in small molecule activation.
To compare its reactivity with related thorium complexes.

Main Methods:

Synthesis of (η⁵-C₅Me₅)₂ThMe₂ (1) with dippNH₂ in the presence of dmap.
Characterization of the resulting thorium imido metallocene (4).
Exploration of the reactivity of complex 4 with various small molecules (S₈, alkynes, azides, etc.).

Main Results:

Successful synthesis of terminal thorium imido metallocene (η⁵-C₅Me₅)₂Th(═Ndipp)(dmap) (4).
Complex 4 demonstrates broad reactivity, activating diverse small molecules.
Reactions include metallaheterocycle formation, deprotonation, and Friedel-Crafts type reactions.
Comparison with related complexes reveals the influence of ligand substituents on reactivity.

Conclusions:

The synthesized thorium imido metallocene is a highly reactive species.
Its reactivity profile is diverse, enabling various chemical transformations.
Ligand design significantly impacts the catalytic potential of thorium imido complexes.