顾客
发表于 2025-3-28 16:45:45
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athlete’s-foot
发表于 2025-3-28 22:25:27
F. Stelzer,R. Schitter,Th. Steinhäuslerrcen (aka Wissen) der Entscheidungsträger:innen innerhalb von Organisationen betont. Wissensprobleme respektive mangelnde Kognitionen gelten als erkenntnistheoretische Hindernisse für strategisches Handeln. Zur Erzeugung eines besseren Verständnisses von Entscheidungsfindungen in Situationen variabl
grotto
发表于 2025-3-29 02:03:01
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incarcerate
发表于 2025-3-29 04:33:35
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扔掉掐死你
发表于 2025-3-29 07:26:47
The Use of Non-Traditional Catalysts in the Romp of Cycloolefinss of W or Mo (usually WCl.) and organometallic derivatives of Al, Sn, Li or Mg . The main role of the latters is to alkylate the transition metal with the formation of σ-metal-carbon bond of relatively low stability. Although the decomposition of such organometallic compounds proceeds mostly via
Commemorate
发表于 2025-3-29 11:43:54
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Criteria
发表于 2025-3-29 16:26:03
Ring-Opening Metathesis Polymerization of Cycloolefens Using Tungsten-Tetraphenylporphyrinate Cataly presence of recently reported catalytic systems consisting of tungsten-tetraphenylporphyrinate and aluminoxane, under inert atmosphere at room temperature, in aromatic solvents. The catalyst precursor was prepared by interaction of WCl. with free tetraphenylporphyrin in carbon tetrachloride and cha
chronicle
发表于 2025-3-29 22:59:23
Metathesis Ring-Chain Equilibrium in Cyclobutene and 1-Methylcyclobutene Systems, acyclic diene metathesis of 1,5-hexadiene and the intramolecular metathesis degradation of 1,4-polybutadiene (1,4-BR) were studied intensely using several stable tungsten and molybdenum carbene complexes as well as classical metathesis catalyst. Focus of our interest was the determination of the s
AORTA
发表于 2025-3-30 03:05:41
Olefin Cyclopropanation or Olefin Metathesis with Late Transition Metal Complexes?d rhodium-based complexes provide outstanding cyclopropanation catalysts, those two metals have no applications in olefin metathesis Ruthenium-based complexes, on the other hand are known to mediate both olefin metathesis and/or cyclopropanation reactions , as sketched in scheme 1 for a cyclo
Gyrate
发表于 2025-3-30 05:01:49
Initiation, Propagation and Termination of Olefin Metathesis Reactionsalyst system containing a transition metal compound (precursor), frequently in conjunction with a second compound (cocatalyst) and sometimes a third (promoter). Transition metals carbenes formed in these systems trigger the transalkylidenation (i.e. metathesis) of olefins The carbene mechanism [