作者: encyclopedia 時間: 2025-3-21 23:49
Die staatliche Aufsicht über die Eisenbahnennd the production of generate useful chemicals from renewable raw materials. Three variants of alkene metathesis: self-metathesis, ethenolysis and cross-metathesis applied to plant oil derivatives will show new routes to fine chemicals, bifunctional products, polymer precursours and industry intermediates.作者: 溝通 時間: 2025-3-22 04:25 作者: Lament 時間: 2025-3-22 06:29
https://doi.org/10.1007/978-3-030-04933-1eculiar architecture of the dienyne precursor, exhibiting both a 1,6- and a 1,5-enyne skeleton, leads, in the presence of alkynophilic gold catalysts, to a mixture of bicyclic compounds. DFT calculations are presented that rationalize in full THE manifold of reactions that lead to the different products.作者: 抗體 時間: 2025-3-22 10:45
Alkene Metathesis and Renewable Materials: Selective Transformations of Plant Oilsnd the production of generate useful chemicals from renewable raw materials. Three variants of alkene metathesis: self-metathesis, ethenolysis and cross-metathesis applied to plant oil derivatives will show new routes to fine chemicals, bifunctional products, polymer precursours and industry intermediates.作者: inhibit 時間: 2025-3-22 14:46 作者: inhibit 時間: 2025-3-22 18:57
Mechanism of Gold-Catalyzed Cycloisomerization of Enynyl Esterseculiar architecture of the dienyne precursor, exhibiting both a 1,6- and a 1,5-enyne skeleton, leads, in the presence of alkynophilic gold catalysts, to a mixture of bicyclic compounds. DFT calculations are presented that rationalize in full THE manifold of reactions that lead to the different products.作者: 兇殘 時間: 2025-3-22 23:03
Recent Advances in Ruthenium Catalysts for Alkene Metathesisnt and many research groups are actively pursuing the quest for the next generation of alkene metathesis catalysts. The present contribution aims at providing a critical survey of some of the most significant achievements accomplished toward this goal during the last few years. New ligands and compl作者: RAGE 時間: 2025-3-23 04:13 作者: 豎琴 時間: 2025-3-23 06:37
Ruthenium–Indenylidene Complexes Bearing Saturated N-Heterocyclic Carbenes: Synthesis and Applicatio3-phenylinden-1-ylidene), . (L = PCy.), . (L = PPh.), . (L = py) from commercially available Cl.Ru(PR.).(3-phenylinden-1-ylidene), . (R = Cy), . (R = Ph), is reported, and the summed complexes proved to be useful catalysts for various ring-closing metathesis reactions. The catalytic data reported fu作者: TRAWL 時間: 2025-3-23 12:09
Building Indenylidene–Ruthenium Catalysts for Metathesis Transformationsby the large number of applications for natural product synthesis. Among the numerous catalysts developed to mediate olefin metathesis transformations, ruthenium–indenylidene complexes are robust and powerful pre-catalysts. The discovery of this catalyst category was slightly muddled due to a first 作者: Inveterate 時間: 2025-3-23 14:06 作者: 言外之意 時間: 2025-3-23 19:03
Ruthenium Catalysts Bearing Carboxylate Ligandsis catalysts is discussed. New catalytic system due to high affinity to silica gel allow to efficient catalyst removal to obtain colorless products with low ruthenium contamination. Unique structural motif allows to introduce new carboxylate and sulfonate derived ligands without use of silver or th作者: Ordnance 時間: 2025-3-23 23:44
Ruthenium—Arene Complexes Derived from NHC?CO2 and NHC?CS2 Zwitterionic Adducts and Their Use in Oleorresponding N-heterocyclic carbenes (NHCs) with either carbon dioxide or carbon disulfide. All the zwitterionic products were characterized by various analytical techniques, including thermogravimetric analysis (TGA). Their ability to act as NHC ligand precursors for in situ catalytic applications 作者: insomnia 時間: 2025-3-24 02:50 作者: SPURN 時間: 2025-3-24 09:09
Mesoporous Molecular Sieves Based Catalysts for Olefin Metathesis and Metathesis Polymerizationa as supports are reported. The catalysts were prepared either by spreading of transition metal oxidic phase on the support surface or by immobilizing transition metal compounds (mostly organometallic) on the support. The activity of these catalysts in various types of metathesis reactions (i.e. alk作者: organism 時間: 2025-3-24 12:33 作者: Filibuster 時間: 2025-3-24 17:51 作者: 思想上升 時間: 2025-3-24 21:25
Functionalisation of Vinylsubstituted (Poly)Siloxanes and Silsesquioxanes via Cross-Metathesis and Sing with acetylenes for functionalisation of vinylsubstituted (poly)organosiloxanes were overviewed. Cross-metathesis and silylative coupling of olefins with vinylsilicon compounds catalysed by ruthenium complexes were shown to constitute two valuable, complementary synthetic routes leading to funct作者: 多產(chǎn)子 時間: 2025-3-25 01:58
The Olefin Metathesis Reactions in Dendrimerslly results from our group are reviewed here. Dendrimers have been loaded at their periphery with ruthenium-chelating bis-phosphines, which leads to the formation of dendrimer-cored stars by ring-opening-metathesis polymerization (ROMP). CpFe.-induced perallylation of polymethylaromatics (Cp = η5-C.作者: hematuria 時間: 2025-3-25 03:20 作者: 憤慨點吧 時間: 2025-3-25 11:30 作者: sparse 時間: 2025-3-25 13:17 作者: Lumbar-Spine 時間: 2025-3-25 17:58 作者: 花爭吵 時間: 2025-3-25 22:31 作者: vasospasm 時間: 2025-3-26 00:11 作者: 熱烈的歡迎 時間: 2025-3-26 08:15 作者: indifferent 時間: 2025-3-26 11:07 作者: prodrome 時間: 2025-3-26 14:50
3-phenylinden-1-ylidene), . (L = PCy.), . (L = PPh.), . (L = py) from commercially available Cl.Ru(PR.).(3-phenylinden-1-ylidene), . (R = Cy), . (R = Ph), is reported, and the summed complexes proved to be useful catalysts for various ring-closing metathesis reactions. The catalytic data reported fu作者: Ambulatory 時間: 2025-3-26 19:46
Nooit meer angst bij de tandartsby the large number of applications for natural product synthesis. Among the numerous catalysts developed to mediate olefin metathesis transformations, ruthenium–indenylidene complexes are robust and powerful pre-catalysts. The discovery of this catalyst category was slightly muddled due to a first 作者: 燈泡 時間: 2025-3-27 01:02
Programma 1. Onderzoek op vliegangstlectronically, but at the same time makes the catalysts more hydrophilic. Catalysts can be therefore efficiently used not only in traditional media, such as methylene chloride and toluene, but also in technical-grade alcohols, alcohol— water mixtures and in neat water. Finally, in this overview the 作者: 襲擊 時間: 2025-3-27 03:54 作者: Occipital-Lobe 時間: 2025-3-27 08:27
Tatiana Savoia Landini,Fran?ois Dépelteauorresponding N-heterocyclic carbenes (NHCs) with either carbon dioxide or carbon disulfide. All the zwitterionic products were characterized by various analytical techniques, including thermogravimetric analysis (TGA). Their ability to act as NHC ligand precursors for in situ catalytic applications 作者: 法律的瑕疵 時間: 2025-3-27 13:05 作者: 兩棲動物 時間: 2025-3-27 17:24 作者: 廢除 時間: 2025-3-27 18:59 作者: white-matter 時間: 2025-3-27 23:28
https://doi.org/10.1007/978-3-658-37849-3 more common five- and six-membered rings. This review discusses factors that determine the probability and efficiency of cyclization, and experimental methods that have been used to increase selectivity for RCM products, with specific reference to the concentrations at which RCM can be achieved. Th作者: 越自我 時間: 2025-3-28 02:48
https://doi.org/10.1007/978-3-322-82217-8ing with acetylenes for functionalisation of vinylsubstituted (poly)organosiloxanes were overviewed. Cross-metathesis and silylative coupling of olefins with vinylsilicon compounds catalysed by ruthenium complexes were shown to constitute two valuable, complementary synthetic routes leading to funct作者: gain631 時間: 2025-3-28 08:36 作者: DOTE 時間: 2025-3-28 14:20
Die staatliche Aufsicht über die Eisenbahnennd the production of generate useful chemicals from renewable raw materials. Three variants of alkene metathesis: self-metathesis, ethenolysis and cross-metathesis applied to plant oil derivatives will show new routes to fine chemicals, bifunctional products, polymer precursours and industry interme作者: RACE 時間: 2025-3-28 14:56
https://doi.org/10.1007/978-3-642-50745-8n of complex molecular structures. Olefin metathesis is indeed particularly suited for the construction of small open-chain molecules and macrocycles using crossmetathesis and ring-closing metathesis, respectively. These reactions serve, ., as key steps in the synthesis of various agrochemicals and 作者: 半導體 時間: 2025-3-28 22:45
Entwurfsbearbeitung und Modellversucheons are used to rationalize the complex mechanistic pathway from the starting precatalyst to the experimentally characterized decomposition products. In particular, we show that all the intermediates proposed by Grubbs and coworkers are indeed possible intermediates in the deactivation pathway, alth作者: ADOPT 時間: 2025-3-29 00:55
https://doi.org/10.1007/978-3-322-90091-3. We demonstrate that the PM6 method reproduces with interesting accuracy the geometries located with a DFT approach. As for the energetics, the relative DFT stability of the metallacycle with respect to the coordination intermediate is reproduced with reasonable accuracy by the PM6 method, whereas 作者: 徹底明白 時間: 2025-3-29 06:00
https://doi.org/10.1007/978-3-030-04933-1eculiar architecture of the dienyne precursor, exhibiting both a 1,6- and a 1,5-enyne skeleton, leads, in the presence of alkynophilic gold catalysts, to a mixture of bicyclic compounds. DFT calculations are presented that rationalize in full THE manifold of reactions that lead to the different prod作者: COKE 時間: 2025-3-29 08:47 作者: Merited 時間: 2025-3-29 11:50 作者: 負擔 時間: 2025-3-29 16:43 作者: 慢跑 時間: 2025-3-29 21:16
Valerian Dragutan,Albert Demonceau,Eugene Sh. Fink作者: EXALT 時間: 2025-3-30 03:55 作者: FLINT 時間: 2025-3-30 07:24 作者: LINE 時間: 2025-3-30 09:27 作者: 偽造者 時間: 2025-3-30 13:28
https://doi.org/10.1057/9781137312112henium—arene complexes of generic formula (.-cymene)Ru(μ-Cl).RuCl(η.-C.H.)(L) and their derivatives resulting from the substitution of the labile ethylene moiety with vinylidene, allenylidene, or indenylidene units作者: 胎兒 時間: 2025-3-30 19:36
Florence Delmotte,Christophe Majastreantages of these catalysts consist generally in their high activity and selectivity, easy separation of catalysts from reaction products and the preparation of products free of catalyst residue. The examples of pore size influence on the selectivity in metathesis reactions are also given.作者: fulmination 時間: 2025-3-31 00:02
,Theorien des Nord-Süd-Konflikts,esence of acrylic acid or metha-crylate, stereospecific CM inhibits oligomerization, and dendritic olefins yield polyacid dendrimers. Finally, cros-metahesis reactions with dendronic acrylate allow dendritic construction and growth.作者: 摘要 時間: 2025-3-31 02:15
https://doi.org/10.1007/978-3-322-90091-3meta-dynamics study of the olefin metathesis reaction, which indicated a reasonable good behavior of the system also under dynamic conditions. In conclusion, the obtained results validate the use of the semiempirical PM6 method for preliminary and computationally fast screening on new ligands/substrates in Ru catalyzed olefin metathesis.作者: neuron 時間: 2025-3-31 07:05 作者: Prophylaxis 時間: 2025-3-31 12:36 作者: aspersion 時間: 2025-3-31 15:44
The Olefin Metathesis Reactions in Dendrimersesence of acrylic acid or metha-crylate, stereospecific CM inhibits oligomerization, and dendritic olefins yield polyacid dendrimers. Finally, cros-metahesis reactions with dendronic acrylate allow dendritic construction and growth.作者: coalition 時間: 2025-3-31 18:20 作者: jabber 時間: 2025-4-1 00:43 作者: 諷刺滑稽戲劇 時間: 2025-4-1 04:54
https://doi.org/10.1007/978-3-476-02693-4ith low ruthenium contamination. Unique structural motif allows to introduce new carboxylate and sulfonate derived ligands without use of silver or thallium salts. Latest results of metathesis with derivative of . in ionic liquids and aqueous emulsions are presented
