Výsledky vyhledávání - "TRIAZACYCLOHEXANE COMPLEXES"

A highly selective ethylene tetramerization catalyst

Autor: Sandro Gambarotta, Matthew Sutcliffe, Valeria Fomitcheva, Ilia Korobkov, Khalid Al-Bahily, Robbert Duchateau, Yacoob Shaikh

Publikováno v: Angewandte Chemie-International Edition, 51(6), 1366-1369. WILEY-V C H VERLAG GMBH
Angewandte Chemie-International Edition, 51(6), 1366-1369. Wiley

Small change, big difference: The introduction of an additional CH2 group into the bridge of ligands with two P/N units leads to a different selectivity of the corresponding chromium-based catalysts. Whereas 1 produces an ethylene trimerization syste

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36d2f62eae0063949367026c8a4603c6
https://doi.org/10.1002/anie.201106517

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New iminophosphonamide chromium(II) complexes as highly active polymer-free ethylene oligomerization catalysts

Autor: Khalid Al-Bahily, Zeeshan Y. Ahmed, Ece Koç, Sandro Gambarotta, Robbert Duchateau, Ilia Korobkov

Publikováno v: Organometallics, 30, 6022-6027. American Chemical Society
Organometallics, 30(21), 6022-6027. AMER CHEMICAL SOC INC

The reactions of the deprotonated form of cis-{[(mu-N)(t-Bu)](2)PN(H) (o-OMeC6H4)](2)} (a) with either CrCl2(THF)(2) or CrCl3(THF)(3) afforded the corresponding dimeric Cr(II) and monomeric Cr(III) complexes {cis-[(mu-N)(t-Bu)](2)[PN (o-MeOC6H4)](2)C

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea88ecbf1a32f09bdfc01eb94e22602b
https://doi.org/10.1021/om2008474

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Reactivity of chromium complexes of a bis(imino)pyridine ligand

Autor: Indu Vidyaratne, Jennifer Scott, Sandro Gambarotta, Robbert Duchateau

Publikováno v: Organometallics, 26(13), 3201-3211. AMER CHEMICAL SOC INC
Organometallics, 26(13), 3201-3211. American Chemical Society

A divalent chromium complex of bis(imino)pyridine, {2,6-[2,6-(i-Pr)(2)PhNC(CH3)](2)(C5H3N)}CrCl2 (1), was prepared with the aim of studying its reactivity with alkylating agents. Upon treatment with MeLi, the metal center was both reduced and alkylat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::272cc55c56243cd5ba5c9afd591b650a
https://doi.org/10.1021/om0701423

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Isolation of a Cationic Chromium(II) Species in a Catalytic System for Ethylene Tri- and Tetramerization

Autor: Amir Jabri, Robbert Duchateau, Patrick Crewdson, Ilia Korobkov, Sandro Gambarotta

Publikováno v: Organometallics, 25(3), 715-718. AMER CHEMICAL SOC INC
Organometallics, 25(3), 715-718. American Chemical Society

Treatment of the ethylene tetramerization catalyst precursor [PNP]CrCl3 with Me3Al afforded the new divalent catalyst precursor {[PNP]Cr(m-CI)AlMe3} [ClAlMe3](0.34) [Me4Al](0.66)(.)0.125(hexane)(.)0.25 (toluene) (1). The formation of 1 implies reduct

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9a0143ad42a36528d20e6f7e7135cfc
https://doi.org/10.1021/om050886l

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Switchable Chromium(II) Ethylene Oligomerization/Polymerization Catalyst

Autor: Ilia Korobkov, Robbert Duchateau, Marie-Charlotte Djoman, Patrick Crewdson, Sandro Gambarotta

Publikováno v: Organometallics, 24(22), 5214-5216. AMER CHEMICAL SOC INC
Organometallics, 24(22), 5214-5216. American Chemical Society

The tri- and divalent chromium derivatives of [N-Me,tripyrr] ([N-Me,tripyrr] = 2,5-bis(diphenyl(pyrrol-2-yl)methyl)-l-methylpyrrole) [N-Me,tripyrr]CrCl (1), and [N-Me,tripyrr]Cr(L)(2)center dot(THF)(0.5) (2) [L = THF (2a), pyridine (2b)] were obtaine

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b33aa002eb29fd9d4fc0fa76769e0d81
https://doi.org/10.1021/om050699n

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Role of the metal oxidation state in the SNS-Cr catalyst for ethylene trimerization: Isolation of di- and trivalent cationic intermediates

Autor: Sandro Gambarotta, Amir Jabri, Patrick Crewdson, Robbert Duchateau, Ilia Korobkov, Claire N. Temple

Publikováno v: Journal of the American Chemical Society, 128(28), 9238-9247. AMER CHEMICAL SOC
Journal of the American Chemical Society, 128(28), 9238-9247. American Chemical Society

The reaction of the highly selective [CySCH2CH2N(H)CH2CH2SCy]CrCl3 catalyst precursor with alkyl aluminum activators was examined with the aim of isolating reactive intermediates. Reaction with Me3Al afforded a cationic trivalent chromium alkyl speci

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e193afcb0ac9aef570e52768a1fbd4f
https://research.rug.nl/en/publications/7da3b5fa-8d22-44f6-a260-9c3d34fed429

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