Results 1 to 10 of about 20,042 (215)
Catalysis Today, 2019 Metallocene-based olefin polymerization catalysts often require large excesses of co-catalyst for optimal catalyst activation. In this work, mechanistic insights into the activation of supported metallocenes by methylaluminoxane as co-catalyst are ...
M. E. Z. Velthoen +3 more
semanticscholar +2 more sources
Cp* Noninnocence Leads to a Remarkably Weak C-H Bond via Metallocene Protonation.
Journal of the American Chemical Society, 2019 Metallocenes, including their permethylated variants, are extremely important in organometallic chemistry. In particular, many are synthetically useful either as oxidants (e.g., Cp2Fe+) or as reductants (e.g., Cp2Co, Cp*2Co, and Cp*2Cr).
Matthew J. Chalkley +2 more
semanticscholar +1 more source
Generalizing metallocene mechanochemistry to ruthenocene mechanophores
Chemical Science, 2019 This work establishes ruthenocene as new metallocene-based mechanophores that exhibit an intriguing combination of force-free thermal stability and mechanical lability.
Ye Sha +6 more
semanticscholar +1 more source
Acta Crystallographica Section E: Crystallographic Communications, 2017 The crystal structure of a solvated zirconocene pentafulvene complex with a bulky adamantylidene substitution pattern, namely (η5,η1-adamantylidenepentafulvene)bis(η5-cyclopentadienyl)zirconium(IV)–toluene–n-hexane (8/1/1), [Zr(C15H18)(C5H5)2]·0.125C7H8 ...
Malte Fischer +2 more
doaj +1 more source
Molecules, 2021 Homogeneous olefin polymerization catalysts are activated in situ with a co-catalyst ([PhN(Me)2-H]+[B(C6F5)4]− or [Ph3C]+[B(C6F5)4]−) in bulk polymerization media. These co-catalysts are insoluble in hydrocarbon solvents, requiring excess co-catalyst (>3
Hyun-Ju Lee +7 more
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Molecules, 2022 A combination of different types of redox-active systems in one molecule makes it possible to create coordination compounds with extended redox abilities, combining molecular and electronic structures determined by the features of intra- and ...
Svetlana V. Baryshnikova +1 more
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Polímeros, 2003 The intermolecular defect distribution of poly(propylenes) of the Ziegler-Natta (ZN) and metallocene (M) types is assessed by classical fractionation and analysis of the fractions by GPC and 13C NMR.
Rufina G. Alamo
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Modeling intraparticle transports during propylene polymerizations using supported metallocene and dual function metallocene as catalysts: Single particle model [PDF]
Chemical Industry and Chemical Engineering Quarterly, 2014 Two improved multigrain models (MGMs) for preparing homopolypropylene and long chain branched polypropylene via propylene polymerization using silica-supported metallocene or dual function metallocene as catalysts are presented in this paper ...
Li Hua-Rong, Che Liming, Luo Zheng-Hong
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Journal of the American Chemical Society, 2018 The synthesis, structure, and reactivity of a base-free terminal actinide phosphinidene metallocene have been comprehensively studied. The salt metathesis reaction of the thorium methyl iodide complex Cp‴2Th(I)Me (2; Cp‴ = η5-1,2,4-(Me3C)3C5H2) with Mes ...
Congcong Zhang +4 more
semanticscholar +1 more source
Modeling of metallocene catalyzed propylene polymerization in fluidized bed reactors [PDF]
MATEC Web of Conferences, 2019 A study was performed to improve the model for metallocene catalyzed polyolefin polymerization in fluidized bed reactor by adapting multi-scale modeling approach.
Law Chew-Sang, Hussain Mohd Azlan
doaj +1 more source