Novel Dendritic PNP Chromium Complexes: Synthesis, Characterization, and Performance on Ethylene Oligomerization

2017 ◽  
Vol 100 (12) ◽  
pp. e1700162 ◽  
Author(s):  
Jun Wang ◽  
Rui Gao ◽  
Na Zhang ◽  
Xiangkun Tan ◽  
Libo Wang ◽  
...  
Keyword(s):  
Ethylene Oligomerization ◽  
Chromium Complexes ◽  
And Performance

scholarly journals Synthesis, Characterization and Ethylene Oligomerization Studies of Chromium Complexes Bearing Imino-Furfural Ligands

2014 ◽  
Author(s):  
Ana H. D. P. S. Ulbrich ◽  
Jorge L. S. Milani ◽  
Paolo R. Livotto ◽  
Jean-François Carpentier ◽  
Osvaldo L. Casagrande Jr.
Keyword(s):  
Ethylene Oligomerization ◽  
Chromium Complexes

Novel dendrimer-based nickel catalyst: synthesis, characterization and performance in ethylene oligomerization

2014 ◽  
Vol 68 (11) ◽  
Author(s):  
Jun Wang ◽  
Guang Yang ◽  
Cui-Qin Li ◽  
Wei-Guang Shi ◽  
Si-Han Wang
Keyword(s):  
Catalytic Activity ◽  
Nickel Complex ◽  
Nickel Chloride ◽  
Negative Influence ◽  
Ethylene Oligomerization ◽  
Ni Catalyst ◽  
Catalyst Precursor ◽  
Elemental Analyses ◽  
And Performance ◽  
Complexation Reactions

AbstractA novel nickel metallodendrimer was synthesized with poly(amidoamine), 3,5-di-tert-butyl-2-hydroxy-benzaldehyde and nickel chloride via the Schiff’s base and the complexation reactions. Structures of the dendritic ligand and its nickel complex were characterized by IR, NMR, UV, ESI-MS and elemental analyses. This new nickel metallodendrimer as a catalyst precursor, together with methylaluminoxane as an activator, was evaluated in the ethylene oligomerization. Under the conditions of 0.5 h, 0.5 MPa, 25°C and Al/Ni mole ratio 500: 1 employed for the nickel complex, the catalytic activity showed a maximum value of 4.93 × 105 grams per mole of Ni catalyst per hour. Substituents on the benzene ring seem to have a negative influence on the catalytic activity of the complex.

Catalytic Properties of Chromium Complexes Based on 1,2-Bis(diphenylphosphino)benzene in the Ethylene Oligomerization Reaction

2019 ◽  
Vol 59 (S1) ◽  
pp. S72-S87 ◽  
Author(s):  
D. N. Cheredilin ◽  
A. M. Sheloumov ◽  
A. A. Senin ◽  
G. A. Kozlova ◽  
V. V. Afanas’ev ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Ethylene Oligomerization ◽  
Chromium Complexes ◽  
Oligomerization Reaction

Chromium Complexes Supported by Bidentate Thioether-Imine [N,S] Ligands: Synthesis and Ethylene Oligomerization Studies

2021 ◽  
Author(s):  
Jorge Luiz Sônego Milani ◽  
André Francisco Pivato Biajoli ◽  
Fernanda I Batista ◽  
Robson da Silva Oliboni ◽  
Osvaldo de Lazaro Casagrande
Keyword(s):  
General Formula ◽  
Ethylene Oligomerization ◽  
Chromium Complexes

A series of new Cr(III) complexes of general formula [Cr{N,S}(THF)Cl3] (2a, N,S = PhS-2-PhCH=N-tBu; 2b, N,S = PhS-2-PhCH=N-C6H4-4-OMe; 2c, N,S = PhS-2-PhCH=N-C6H5; 2d, N,S = tBuS-2-PhCH=N-C6H5) were prepared and characterized...

Chromium complexes based on thiophene-imine ligands for ethylene oligomerization

2019 ◽  
Vol 33 (3) ◽  
pp. e4697 ◽  
Author(s):  
Jorge Ferreira ◽  
Raquel Zilz ◽  
Igor S. Boeira ◽  
Sabrina M. da Silva ◽  
Adriana C.A. Casagrande ◽  
...  
Keyword(s):  
Ethylene Oligomerization ◽  
Chromium Complexes ◽  
Imine Ligands

scholarly journals Selective Ethylene Oligomerization with Chromium Complexes Bearing Pyridine–Phosphine Ligands: Influence of Ligand Structure on Catalytic Behavior

2014 ◽  
Vol 33 (20) ◽  
pp. 5749-5757 ◽  
Author(s):  
Yun Yang ◽  
Joanna Gurnham ◽  
Boping Liu ◽  
Robbert Duchateau ◽  
Sandro Gambarotta ◽  
...  
Keyword(s):  
Phosphine Ligands ◽  
Ethylene Oligomerization ◽  
Chromium Complexes ◽  
Catalytic Behavior ◽  
Ligand Structure

scholarly journals Ethylene oligomerization promoted by chromium complexes bearing pyrrolide–imine–amine/ether tridentate ligands

2015 ◽  
Vol 44 (36) ◽  
pp. 16073-16080 ◽  
Author(s):  
A. C. Pinheiro ◽  
T. Roisnel ◽  
E. Kirillov ◽  
J.-F. Carpentier ◽  
Osvaldo L. Casagrande
Keyword(s):  
Ethylene Oligomerization ◽  
Slight Variation ◽  
Chromium Complexes ◽  
Tridentate Ligands ◽  
Catalytic Behavior

Chromium complexes bearing pyrrolide–imino-amine/ether tridentate ligands have been synthesized and their catalytic behavior in ethylene oligomerization has been investigated. Drastic changes in selectivity have been observed upon slight variation of the MAO-to-Cr ratio.

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