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Norbornene

About: Norbornene is a research topic. Over the lifetime, 5628 publications have been published within this topic receiving 104495 citations. The topic is also known as: norbornylene & norcamphene.


Papers
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Journal ArticleDOI
TL;DR: In this article, the Pd-catalyzed hydrosilylation of norbornene with trichlorosilane using different chiral ferrocenyl ligands containing a phosphine and a pyrazole as donors was studied.
Abstract: The Pd-catalyzed hydrosilylation of norbornene with trichlorosilane using different chiral ferrocenyl ligands containing a phosphine and a pyrazole as donors was studied. Both steric and electronic factors affect stereoselectivity in this system. The combination of a sterically bulky pyrazole substituent with a π-acidic phosphine leads to an enantioselectivity of >99.5% ee. Important substrate electronic effects on stereoselectivity were observed using para-substituted styrenes.

45 citations

Journal ArticleDOI
TL;DR: In this article, copolymerization of ethylene with endo-dicyclopentadiene (DCP) was performed by using Cp2ZrCl2 (Cp = Cyclopentadienyl), Et(Ind) 2ZrCL2 (Ind = Indenyl), and Ph2C(Cp)(Flu)Zrcl2 (Flu = Fluorenyl) combined with MAO as cocatalyst.
Abstract: Copolymerizations of ethylene with endo-dicyclopentadiene (DCP) were performed by using Cp2ZrCl2 (Cp = Cyclopentadienyl), Et(Ind)2ZrCl2 (Ind = Indenyl), and Ph2C(Cp)(Flu)ZrCl2 (Flu = Fluorenyl) combined with MAO as cocatalyst. Among these three metallocenes, Et(Ind)2ZrCl2 showed the highest catalyst performance for the copolymerization. From 1H-NMR analysis, it was found that DCP was copolymerized through enchainment of norbornene rings. The copolymer was then epoxidated by reacting with m-chloroperbenzoic acid. 13C-NMR spectrum of the resulting copolymer indicated the quantitative conversion of olefinic to epoxy groups. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 103–108, 1999

45 citations

Patent
08 Dec 1999
TL;DR: In this paper, a catalyst system and a process for the bulk addition polymerization or of polycyclic olefins, such as norbornene, methylnorbornene and ethylnorbornenes, was presented.
Abstract: A catalyst system and a process for the bulk addition polymerization or of polycyclic olefins, such as norbornene, methylnorbornene, ethylnorbornene, butylnorbornene or hexylnorbornene, 1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonapthalene, 5,5′-(1,2-ethanediyl)bisbicyclo[2.2.1]hept-2-ene, and 1,4,4a,4b,5,8,8a,8b-octahydro-1,4:5,8-dimethanobiphenylene are disclosed. The catalyst includes an organonickel or organopalladium transition metal procatalyst and an activator compound. Polymerization can be carried out in a reaction injection molding process to yield thermoplastic and thermoset molded polymeric articles possessing high glass transition temperatures.

45 citations

Journal ArticleDOI
TL;DR: In this article, a terpolymerization of polyethylene, propylene, and ethylidene norbornene (D) was performed on a supported EPDM with E/P ratio which is similar to the ratio in the feed.
Abstract: Ethylene, propylene, and ethylidene norbornene (D) were terpolymerized by Et [Ind]2ZrCl2/MAO in solution and supported on silica. The presence of D decreases the rate of polymerization. EPDM containing between 3 and 22 wt % of D were synthesized which have narrow MW distribution. The supported catalyst produces EPDM with E/P ratio which are similar to the ratio in the feed.

45 citations

Journal ArticleDOI
TL;DR: In this article, a new diphosphinoamine ligand [Ph2PN(p-C6H4OMe)PPh2] was prepared through aminolysis reaction of p-methoxyaniline with Ph2PCl in the presence of NEt3.
Abstract: A new diphosphinoamine ligand [Ph2PN(p-C6H4OMe)PPh2] was prepared through aminolysis reaction of p-methoxyaniline with Ph2PCl in the presence of NEt3. Consequently, the corresponding nickel (II) diphosphinoamine complex [(p-C6H4OMe)N(PPh2)2NiCl2] was synthesized and characterized. The solid-state structure of the complex was determined by single-crystal X-ray diffraction. As combined with methylaluminoxane (MAO), the complex displayed high catalytic activity for vinyl polymerization of norbornene. Copyright © 2005 John Wiley & Sons, Ltd.

45 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202376
2022165
2021113
2020119
2019141
2018136