Zobrazeno 1 - 10
of 368
pro vyhledávání: '"Maurice Brookhart"'
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-6 (2019)
Ultra-high molecular weight polyethylene is a desirable commodity. Here the authors show that a tri-1-adamantylphosphine-nickel complex, when exposed to alkyl aluminium activators, polymerizes ethylene to ultrahigh-molecular-weight polyethylene with
Externí odkaz:
https://doaj.org/article/8980509c560843dc826fb054d03181a1
Publikováno v:
Organometallics. 42:235-239
Publikováno v:
Organometallics. 40:2709-2715
Synthesis of end-functionalized poly(norbornenes) (PNBs) and poly(ethylidenenorbornenes) (PENBs) were prepared using the palladium catalyst tBu3PPdMeCl/NaBArf in combination with the chain transfer...
Publikováno v:
Angewandte Chemie. 133:4616-4619
The reactivity of NiII and PdII olefin polymerization catalysts can be enhanced by introduction of electron-withdrawing substituents on the supporting ligands rendering the metal centers more electrophilic. Reported here is a comparison of ethylene p
Publikováno v:
Journal of the American Chemical Society. 142:15431-15437
Palladium diimine-catalyzed polymerization of olefins using unsaturated alcohols as chain-transfer agents has been demonstrated. The reaction affords aldehyde end-capped polymers whose molecular weight can be tuned by varying the ratio of olefin/chai
Publikováno v:
Journal of the American Chemical Society. 142:7198-7206
New neutral nickel and palladium ethylene polymerization catalysts have been prepared that incorporate an anionic (N,O) chelating ligand. Extensive axial shielding is provided by two 3,5-dichloroaryl moieties in a "sandwich" orientation. Such shieldi
Publikováno v:
Polymer Chemistry. 11:2576-2584
Nickel- and palladium-based catalyst systems were developed to convert 5-ethylidene-2-norbornene (ENB) to oligomers and polymers with highly controllable molecular weights. Depending on the choice of central metal ion, supporting ligand, and α-olefi
Publikováno v:
Organometallics. 38:4658-4668
A series of 8-halonapthalen-1-amines (6a–d, X = F, Cl, Br, I) were prepared and converted to the α-diimines of 2,3-butanedione (7a–d). The nickel dibromide and zinc dibromide complexes of these dii...
Autor:
Zhou Chen, Maurice Brookhart
Publikováno v:
Accounts of Chemical Research. 51:1831-1839
The most ubiquitous polymer, polyethylene (PE), is produced either through a radical-initiated process or, more commonly, through a coordination/insertion process employing early transition metal catalysts, particularly titanium- and chromium-based s
Publikováno v:
Macromolecules. 50:9066-9070