Results 31 to 40 of about 20,349 (227)

Olefin metathesis in nano-sized systems

open access: yesBeilstein Journal of Organic Chemistry, 2011
The interplay between olefin metathesis and dendrimers and other nano systems is addressed in this mini review mostly based on the authors’ own contributions over the last decade.
Didier Astruc   +7 more
doaj   +1 more source

Construction of ion bonds in gel-free polydiene-based ionomers without compromising molecular weight

open access: yesPolymer Testing, 2022
Rubber-based ionomers have attracted extensive research interest from academy and industry attributing to their distinct physical mechanical properties.
Song Yue   +3 more
doaj   +1 more source

Synthesis of Telechelic Polyisoprene via Ring-Opening Metathesis Polymerization in the Presence of Chain Transfer Agent [PDF]

open access: yes, 2010
Telechelic polyisoprene was synthesized via the ring-opening metathesis polymerization (ROMP) of 1,5-dimethyl-1,5-cyclooctadiene (DMCOD) in the presence of cis-1,4-diacetoxy-2-butene as a chain transfer agent (CTA).
Grubbs, Robert H., Thomas, Renee M.
core   +2 more sources

Relevance of cis- and trans-dichloride Ru intermediates in Grubbs-II olefin metathesis catalysis (H(2)IMesCl(2)Ru=CHR) [PDF]

open access: yes, 2008
Using density functional theory with the B3LYP and M06 functionals, we show conclusively that the (H2IMes)(Cl)2Ru olefin metathesis mechanism is bottom-bound with the chlorides remaining trans throughout the reaction, thus attempts to effect diastereo ...
Benitez, Diego   +2 more
core   +2 more sources

Synthesis of Tetrasubstituted Alkenes via Metathesis

open access: yesMolecules, 2012
Fully substituted olefin generation via metathesis is presented. Catalyst development, optimization of reaction conditions and substrate screening are included.
Seung-Mann Paek
doaj   +1 more source

Monotelechelic Poly(oxa)norbornenes by Ring-Opening Metathesis Polymerization Using Direct End-Capping and Cross-Metathesis [PDF]

open access: yes, 2010
Two different methodologies for the synthesis of monotelechelic poly(oxa)norbornenes prepared by living ring-opening metathesis polymerization (ROMP) are presented.
Grubbs, Robert H., Matson, John B.
core   +2 more sources

DFT Investigation into the Role of Conventional and Ionic Liquids as Solvents in Olefin Metathesis

open access: yesInternational Journal of Electrochemical Science, 2013
The effects of conventional and ionic liquids on the metathesis of olefin have been investigated by means of quantum chemical calculations to establish the factors favouring the metathesis of olefin in ionic liquid. The results suggest that ionic liquids
Priya A. Thomas   +2 more
doaj   +1 more source

Conformations of N-Heterocyclic Carbene Ligands in Ruthenium Complexes Relevant to Olefin Metathesis [PDF]

open access: yes, 2009
The structure of ruthenium-based olefin metathesis catalyst 3 and model π-complex 5 in solution and in the solid state are reported. The N-tolyl ligands, due to their lower symmetry than the traditional N-mesityl substituents, complicate this analysis ...
Benitez, Diego   +6 more
core   +3 more sources

Probing the Electronic Structure of Spectator Oxo Ligands by 17O NMR Spectroscopy

open access: yesCHIMIA, 2020
Spectator oxo ligands are ubiquitous in catalysis, in particular in olefin epoxidation and olefin metathesis. Here we use computationally derived 17O NMR parameters to probe the electronic structure of spectator oxo ligands in these two reactions.
Christopher P. Gordon   +1 more
doaj   +1 more source

Tandem ring-closing metathesis reaction with a ruthenium catalyst containing a N-heterocyclic ligand [PDF]

open access: yes, 2001
The highly active catalyst 2 was used in tandem RCM to make molecules with various ring systems containing α,β-unsaturated carbonyl ...
Choi, Tae-Lim, Grubbs, Robert H.
core   +1 more source

Home - About - Disclaimer - Privacy