Applications of chloro-aryloxide complexes of tungsten in olefin metathesis: The ring-opening metathesis polymerization of dicyclopentadiene

1991 ◽  
Vol 69 (2) ◽  
pp. 157-169 ◽  
Author(s):  
Djaber Boutarfa ◽  
Christophe Paillet ◽  
Michel Leconte ◽  
Jean-Marie Basset
Keyword(s):  
Olefin Metathesis ◽  
Ring Opening ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization

scholarly journals Application of olefin metathesis in the synthesis of functionalized polyhedral oligomeric silsesquioxanes (POSS) and POSS-containing polymeric materials

2019 ◽  
Vol 15 ◽  
pp. 310-332 ◽  
Author(s):  
Patrycja Żak ◽  
Cezary Pietraszuk
Keyword(s):  
Olefin Metathesis ◽  
Ring Opening ◽  
Polymeric Materials ◽  
Acyclic Diene Metathesis ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Cross Metathesis ◽  
Terminal Olefins ◽  
Synthesized Materials

This mini-review summarizes the applications of olefin metathesis in synthesis and functionalization of polyhedral oligomeric silsesquioxanes (POSS) and POSS-containing polymeric materials. Three types of processes, i.e., cross metathesis (CM) of vinyl-substituted POSS with terminal olefins, acyclic diene metathesis (ADMET) copolymerization of divinyl-substituted POSS with α,ω-dienes and ring-opening metathesis polymerization (ROMP) of POSS-substituted norbornene (or other ROMP susceptible cycloolefins) are discussed. Emphasis was put on the synthetic and catalytic aspects rather than on the properties and applications of synthesized materials.

scholarly journals Synthesis of highly stable dual-site immobilized ruthenium olefin metathesis catalyst without ru leaching

2021 ◽  
Vol 2131 (4) ◽  
pp. 042055
Author(s):  
Huanhuan Zhao ◽  
Yanwu Zhang
Keyword(s):  
Block Copolymer ◽  
Olefin Metathesis ◽  
Ring Opening ◽  
Ring Opening Metathesis Polymerization ◽  
Ring Closing Metathesis ◽  
Metathesis Polymerization ◽  
Immobilized Catalyst ◽  
Excellent Activity ◽  
Metathesis Catalyst ◽  
Dual Site

Abstract The tri-block copolymer is used as a carrier to simultaneously immobilize the N-heterocyclic and benzylidene ligands precursor of the Ru-based catalyst to form a dual-site immobilized catalyst. The dual-site immobilized catalyst can catalyze ring-opening metathesis polymerization, ring-closing metathesis and self-metathesis. The dual-site immobilized catalyst shows good heterogeneity in dichloromethane, which simplifies the purification of product and recovery of catalyst. The dual-site immobilized catalyst exhibits excellent activity and recycling performance. The excellent recyclability can be attributed to the capture of ruthenium by the excess ligands precursor on carrier. Importantly, ruthenium residues are not detected in product.

Bis-mixed-carbene ruthenium-thiolate-alkylidene complexes: synthesis and olefin metathesis activity

2015 ◽  
Vol 44 (4) ◽  
pp. 1724-1733 ◽  
Author(s):  
Fatme Dahcheh ◽  
Douglas W. Stephan
Keyword(s):  
Olefin Metathesis ◽  
Ring Opening ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Cross Metathesis ◽  
Vinyl Sulfides ◽  
Alkylidene Complexes

A series of bis-carbene Ru-hydride species were prepared and subsequently shown to react with aryl-vinyl-sulfides to give the corresponding biscarbene-alkylidene complexes. The activities of these species for ring-opening metathesis polymerization, ring-closing and cross-metathesis are reported. While these systems are shown to exhibit modest metathesis activities, the reactivity is enhanced in the presence of BCl3.

Benzylidene-Functionalized Ruthenium-Based Olefin Metathesis Catalysts for Ring-Opening Metathesis Polymerization in Organic and Aqueous Media

2007 ◽  
Vol 26 (26) ◽  
pp. 6515-6518 ◽  
Author(s):  
Adam N. Roberts ◽  
Alison C. Cochran ◽  
David A. Rankin ◽  
Andrew B. Lowe ◽  
Hans-Jörg Schanz
Keyword(s):  
Olefin Metathesis ◽  
Ring Opening ◽  
Aqueous Media ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Metathesis Catalysts

scholarly journals Simple activation by acid of latent Ru-NHC-based metathesis initiators bearing 8-quinolinolate co-ligands

2016 ◽  
Vol 12 ◽  
pp. 154-165 ◽  
Author(s):  
Julia Wappel ◽  
Roland C Fischer ◽  
Luigi Cavallo ◽  
Christian Slugovc ◽  
Albert Poater
Keyword(s):  
Olefin Metathesis ◽  
Ring Opening ◽  
Bond Cleavage ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
The Common ◽  
Metathesis Catalysts

A straightforward synthesis utilizing the ring-opening metathesis polymerization (ROMP) reaction is described for acid-triggered N,O-chelating ruthenium-based pre-catalysts bearing one or two 8-quinolinolate ligands. The innovative pre-catalysts were tested regarding their behavior in ROMP and especially for their use in the synthesis of poly(dicyclopentadiene) (pDCPD). Bearing either the common phosphine leaving ligand in the first and second Grubbs olefin metathesis catalysts, or the Ru–O bond cleavage for the next Hoveyda-type catalysts, this work is a step forward towards the control of polymer functionalization and living or switchable polymerizations.

Chemical transformations of cis-W(CO)4(C5H5N)2 in the ring-opening metathesis polymerization of norbornene

2004 ◽  
Vol 82 (4) ◽  
pp. 499-503 ◽  
Author(s):  
L Bencze ◽  
N Bíró ◽  
B Szabó-Ravasz ◽  
L Mihichuk
Keyword(s):  
Olefin Metathesis ◽  
Ring Opening ◽  
Chemical Transformations ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Hydrogen Shift ◽  
In Situ Formation ◽  
Wittig Reactions ◽  
Co Coupling

The six-coordinate W0 complex cis-W(CO)4(C5H5N)2 has been found to be active in the in situ formation of a carbene species from norbornene, which generates a typical ring-opening metathesis product (ROMP). A proposed mechanism of initiation suggests that the reaction involves a 2,3-hydrogen shift in the coordinated norbornene (η2 → η1). The initiating carbenoid group is identified from the products of the spontaneous carbene–CO coupling and Wittig reactions test. Formation of W(CO)3(η6-C6H5CH3) when toluene is the solvent, followed by reaction with the carbene, is blamed for catalyst deactivation.Key words: bis-pyridine-tetracarbonyl-tungsten, ROMP, olefin metathesis, norbornene.

Synthesis and Purification of Tunable High Tg Electro-Optical Polymers by Ring Opening Metathesis Polymerization

2011 ◽  
Author(s):  
Robert H. Lambeth ◽  
Joseph M. Dougherty ◽  
Joshua A. Orlicki ◽  
Adam M. Rawlett ◽  
Robert C. Hoffman ◽  
...  
Keyword(s):  
Ring Opening ◽  
Optical Polymers ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization
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