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

Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

2.5K
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...
2.5K
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

3.1K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
3.1K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

2.2K
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...
2.2K
Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

3.4K
The radical chain-growth polymerization mechanism consists of three steps: initiation, propagation, and termination of polymerization. The polymerization initiates when a free radical generated from the radical initiator adds to the unsaturated bond in the monomer. The unpaired electron of the free radical and one π electron in the unsaturated bond creates a σ bond between the free radical and the monomer. As a result, the other π electron in the unsaturated bond converts this species into...
3.4K
Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

3.9K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
3.9K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.8K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.8K

You might also read

Related Articles

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

Sort by
Same author

Bridging Lewis acidic antimony centers with electron-withdrawing carborane cages.

Chemical science·2026
Same author

Leveraging Mechanistic Insights into Stereoretentive ROMP for Precision Synthesis of Poly(<i>p</i>-phenylene vinylene)s.

Journal of the American Chemical Society·2026
Same author

Microwave-Assisted Synthesis and Enzyme Stabilization Study of <i>N</i>‑Alkyl Praziquantel Analogs for Arylsulfatase B: Possible Leads for Mucopolysaccharidosis VI Therapy.

ACS omega·2026
Same author

Alkali metal cation effects for rapid C-H activation by iron(0) complexes.

Chemical science·2026
Same author

Site-Divergent Oxidations within Venerable Macrolide Antibiotic Scaffolds Unveil Compounds with Broad Spectrum and Anti-MRSA Activities.

ACS central science·2026
Same author

Binding of Aqueous-Stable, Lipophilic, Hemocompatible Anticancer V<sup>V</sup>O<sub>2</sub> Metallodrugs with Biological Molecules: X-ray Structures of the Adduct of the V<sup>V</sup>-hydrazonato Complex with Hen Egg White Lysozyme.

Inorganic chemistry·2026
Same journal

Steric Mapping, Ligand Dynamics, and Cycloisomerization Catalysis with Redox Robust Mn<sup>I/0/‑I</sup> Dicarbenes.

Organometallics·2026
Same journal

Imidazol-2-ylidene-Based NCCN Ligands for Chiral-at-Iron Catalysis.

Organometallics·2026
Same journal

Ni(DQ)<sub>2</sub>: A Useful Gateway to Zero-Valent Nickel Complexes.

Organometallics·2026
Same journal

Di-Silyl Rhodium(III) and Iridium(III) Complexes as Catalysts in Carbene Insertion Reactions into Hydrosilanes.

Organometallics·2026
Same journal

Isolation of Base-Coordinated 1,4-Disilaquinones.

Organometallics·2026
Same journal

Flash Communication: A Metal-First Approach to Ruthenium Complexes of a Boryl-Centered POBOP Pincer Ligand.

Organometallics·2026
See all related articles
  1. Home
  3. Macrocyclic Ruthenium Ring Expansion Metathesis Polymerization Initiators Exhibit Tether Length-dependent Behavior.
  1. Home
  3. Macrocyclic Ruthenium Ring Expansion Metathesis Polymerization Initiators Exhibit Tether Length-dependent Behavior.

Related Experiment Video

Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization
12:19

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

Published on: November 29, 2018

8.9K

Macrocyclic Ruthenium Ring Expansion Metathesis Polymerization Initiators Exhibit Tether Length-Dependent Behavior.

Meredith N Pomfret1, Lucy P Miller1, Nicholas P Serck1

  • 1Department of Chemistry, University of Washington, Seattle, Washington 98195, United States.

Organometallics
|October 27, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

Cyclic polymers offer enhanced durability. Researchers developed new ruthenium initiators (CBX) for ring-expansion metathesis polymerization (REMP), improving control over polymer properties by adjusting tether length.

More Related Videos

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
08:12

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

3.8K
Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
09:22

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

8.2K

Related Experiment Videos

Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization
12:19

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

Published on: November 29, 2018

8.9K
Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
08:12

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

3.8K
Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
09:22

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

8.2K

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Organometallic Chemistry

Background:

  • Cyclic polymers possess enhanced mechanical durability due to their topology.
  • Ring-expansion metathesis polymerization (REMP) is a growing method for synthesizing cyclic polymers.
  • Understanding initiator structure-activity relationships is crucial for REMP.

Purpose of the Study:

  • To synthesize and evaluate novel cyclic ruthenium-benzylidene initiators (CBX) for REMP.
  • To investigate the impact of tether length on initiator activity and polymer properties.
  • To elucidate the mechanistic differences between REMP and ROMP initiators.

Main Methods:

  • Synthesis of CBX initiators (X=4-6).
  • Mechanistic studies of REMP.
  • Solid-state X-ray crystallography.
  • Density Functional Theory (DFT) calculations.

    • Main Results:

    • CBX initiators demonstrate controlled molar mass in REMP.
    • Tether length significantly influences secondary metathesis, a key step in REMP.
    • Structural and computational analyses reveal initiator-polymerization dynamics.

    Conclusions:

    • The CBX initiator series provides a platform for tunable cyclic polymer synthesis.
    • Tether length is a critical parameter for controlling polymer molar mass in REMP.
    • These findings advance the understanding of REMP mechanisms and initiator design.