Why Less Coordination Provides Higher Reactivity Chromium Phosphinoamidine Ethylene Trimerization Catalysts

ACS Catalysis ◽  
2020 ◽  
Vol 10 (17) ◽  
pp. 9674-9683
Author(s):  
Doo-Hyun Kwon ◽  
Steven M. Maley ◽  
Johnathan C. Stanley ◽  
Orson L. Sydora ◽  
Steven M. Bischof ◽  
...  
Keyword(s):  
Ethylene Trimerization

Spin Surface Crossing between Chromium(I)/Sextet and Chromium(III)/Quartet without Deprotonation in SNS-Cr Mediated Ethylene Trimerization

2011 ◽  
Vol 30 (19) ◽  
pp. 5297-5302 ◽  
Author(s):  
Yun Yang ◽  
Zhen Liu ◽  
Lei Zhong ◽  
Pengyuan Qiu ◽  
Qi Dong ◽  
...  
Keyword(s):  
Ethylene Trimerization

Isolation of a Self-Activating Ethylene Trimerization Catalyst of a Cr-SNS System

2011 ◽  
Vol 30 (15) ◽  
pp. 4159-4164 ◽  
Author(s):  
Khalid Albahily ◽  
Yacoob Shaikh ◽  
Zeeshan Ahmed ◽  
Ilia Korobkov ◽  
Sandro Gambarotta ◽  
...  
Keyword(s):  
Ethylene Trimerization

scholarly journals NMR and EPR trapping of the active species in the ethylene polymerization and trimerization catalyst systems

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
I.E. Soshnikov ◽  
N.V. Semikolenova ◽  
A.A. Antonov ◽  
K.P. Bryliakov ◽  
V.A. Zakharov ◽  
...  
Keyword(s):  
Epr Spectroscopy ◽  
Ethylene Polymerization ◽  
Catalyst Deactivation ◽  
Active Species ◽  
Ion Pair ◽  
Polymerization Catalysts ◽  
Ethylene Trimerization ◽  
Catalyst Systems

AbstractIn this work, previously undetected intermediates of several practically promising catalyst systems for ethylene polymerization and trimerization are discussed. In particular, the activation of ethylene polymerization catalysts (1) LNiCl2 (L = 2,4,6-trimethyl- (N-5,6,7-trihydroquinolin-8-ylidene)phenylamine) with AlEt2Cl and AlMe2Cl, (2) activation of bis(imino)pyridine vanadium(III) chloride L1VIIICl3 (L1 = 2,6-(ArN=CMe)2C5H3N, Ar = 2,6-iPr2C6H3; 2,6-Me2C6H3; 2,4,6-Me3C6H2; 3,5- F2C6H3) with AlMe3/[Ph3C]+[B(C6F5)]4¯ and MAO, and (3) selective ethylene trimerization catalyst (FI)TiCl3 (FI = phenoxyimine ligand with an additional aryl-OCH3 donor) with MAO have been assessed by NMR and EPR spectroscopy. The nature of ion-pair intermediates – the closest precursors of the propagating species – has been established, and the major catalyst deactivation pathways are discussed.

Ethylene Trimerization with Mixed-Donor Ligand (N,P,S) Chromium Complexes:  Effect of Ligand Structure on Activity and Selectivity

2005 ◽  
Vol 24 (4) ◽  
pp. 552-556 ◽  
Author(s):  
David S. McGuinness ◽  
Peter Wasserscheid ◽  
David H. Morgan ◽  
John T. Dixon
Keyword(s):  
Chromium Complexes ◽  
Donor Ligand ◽  
Ligand Structure ◽  
Ethylene Trimerization

The Question of the Cr Oxidation State in the {Cr(SNS)} Catalyst for Selective Ethylene Trimerization: An Unanticipated Re-Oxidation Pathway

2006 ◽  
Vol 45 (42) ◽  
pp. 7050-7053 ◽  
Author(s):  
Claire Temple ◽  
Amir Jabri ◽  
Patrick Crewdson ◽  
Sandro Gambarotta ◽  
Ilia Korobkov ◽  
...  
Keyword(s):  
Oxidation State ◽  
Oxidation Pathway ◽  
Ethylene Trimerization

Decene formation in ethylene trimerization reaction catalyzed by Cr–pyrrole system

2014 ◽  
Vol 475 ◽  
pp. 371-378 ◽  
Author(s):  
Timur M. Zilbershtein ◽  
Vladislav A. Kardash ◽  
Vladlena V. Suvorova ◽  
Anatoly K. Golovko
Keyword(s):  
Ethylene Trimerization
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