Facile Synthesis of Effcient and Selective Ruthenium Olefin Metathesis Catalysts with Sulfonate and Phosphate Ligands [PDF]
, 2010 A series of novel, air-stable ruthenium NHC catalysts with sulfonate and phosphate anions have been prepared easily in one pot at high yields using commercially available precursors.
Grubbs, Robert H., Teo, Peili
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Ru-Catalyzed, cis-Selective Living Ring-Opening Metathesis Polymerization of Various Monomers, Including a Dendronized Macromonomer, and Implications to Enhanced Shear Stability [PDF]
, 2020 An unsaturated polymer’s cis/trans-olefin content has a significant influence on its properties. For polymers obtained by ring-opening metathesis polymerization (ROMP), the cis/trans-olefin content can be tuned by using specific catalysts.
Ahmed, Tonia S. +6 more
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The Polymerization of Internal Olefins
Kobunshi Kagaku, 1966 多くのβ-置換スチレンと無水マレイン酸 (MAn) とは比較的容易に組成1: 1の共重合体を生成する。また, 両モノマーの間に電荷移動型錯合体の生成が認められた。この共重合反応における錯合体の役割を明らかにするために1, 2-ジヒドロナフタリン (ジアリン) とMAnの共重合系を分光学的, および動力学的に研究した。ジアリンとMAnとの間には組成1: 1の電荷移動型錯合体が生成し, その平衡定数はクロロホルム中, 室温でK=0.052±0.004である。この系は熱重合も行なう。ジアリン (M2)-MAn (M1) の熱, および開始剤 (AIBN) による共重合をベンゼン (ポリマーが沈殿する不均一系) およびアセトン (均一系) 中で行ない, 次の結果を得た。AIBN共重合 ...
Shunsuke Murahashi +3 more
openaire +4 more sources
Efficient Synthesis of Narrowly Dispersed Brush Copolymers and Study of Their Assemblies: The Importance of Side Chain Arrangement [PDF]
, 2009 Efficient, one-pot preparation of synthetically challenging, high molecular weight (MW), narrowly dispersed brush block copolymers and random copolymers in high conversions was achieved by ring-opening metathesis (co)polymerization (ROMP) of various ...
Grubbs, Robert H. +3 more
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Ruthenium Olefin Metathesis Catalysts Bearing Carbohydrate-Based N-Heterocyclic Carbenes [PDF]
, 2010 Ru-based olefin metathesis catalysts containing carbohydrate-derived NHCs from glucose and galactose were synthesized and characterized by NMR spectroscopy. 2D-NMR spectroscopy revealed the presence of Ru−C (benzylidene) rotamers at room temperature, and
Grubbs, Robert H., Keitz, Benjamin K.
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Ruthenium-Based Heterocyclic Carbene-Coordinated Olefin Metathesis Catalysts [PDF]
, 2010 The fascinating story of olefin (or alkene) metathesis (eq 1) began almost five decades ago, when Anderson and Merckling reported the first carbon-carbon double-bond rearrangement reaction in the titanium-catalyzed polymerization of norbornene.
Grubbs, Robert H. +1 more
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The charge percolation mechanism and simulation of Ziegler–Natta polymerizations. Part VII. Effects of the distribution of chromium active centers on silica on the polymerization of ethylene [PDF]
Journal of the Serbian Chemical Society, 2008 The charge percolation mechanism (CPM) of olefin polymerization in the presence of transition metal compounds has been applied to explain the polymerization of ethylene by silica supported chromium oxide.
DRAGOSLAV STOILJKOVIC +4 more
doaj +3 more sources
Cis-Selective Ring-Opening Metathesis Polymerization with Ruthenium Catalysts [PDF]
, 2012 Cis-selective ring-opening metathesis polymerization of several monocyclic alkenes as well as norbornene and oxanorbornene-type monomers using a C–H activated, ruthenium-based metathesis catalyst is reported.
Fedorov, Alexey +2 more
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Nature Communications, 2018 Olefin and emulsion polymerizations are incompatible due to the water sensitivity of olefin polymerization catalysts and thus direct synthesis of semi-crystalline polyolefin latexes is difficult.
Camille Boucher-Jacobs +4 more
doaj +1 more source
Characterization and Dynamics of Substituted Ruthenacyclobutanes Relevant to the Olefin Cross-Metathesis Reaction [PDF]
, 2011 The reaction of the phosphonium alkylidene [(H_(2)IMes)RuCl2═CHP(Cy)_3)]^(+) BF_(4)^− with propene, 1-butene, and 1-hexene at −45 °C affords various substituted, metathesis-active ruthenacycles. These metallacycles were found to equilibrate over extended
Blake, Garrett +3 more
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