Ligand-centred oxidative chemistry in sterically hindered salen complexes: an interesting case with nickel

2016 ◽  
Vol 45 (27) ◽  
pp. 10866-10877 ◽  
Author(s):  
F. Thomas
Keyword(s):  
Nickel Complexes ◽  
Redox Chemistry ◽  
Interesting Case ◽  
Salen Complexes ◽  
Sterically Hindered ◽  
Salen Ligands

Salen ligands are ubiquitous chelators, whose nickel complexes readily undergo a ligand-centred redox chemistry in non-coordinating solvents.

Highly efficient metal(iii) porphyrin and salen complexes for the polymerization of rac-lactide under ambient conditions

2019 ◽  
Vol 48 (10) ◽  
pp. 3223-3230 ◽  
Author(s):  
Siriwan Praban ◽  
Parichat Piromjitpong ◽  
Vagulejan Balasanthiran ◽  
Savithra Jayaraj ◽  
Malcolm H. Chisholm ◽  
...  
Keyword(s):  
Room Temperature ◽  
Ambient Conditions ◽  
Highly Efficient ◽  
Salen Complexes ◽  
Salen Ligands ◽  
Lactide Polymerization

Metal(iii) complexes supported by porphyrin and salen ligands were highly efficient for rac-lactide polymerization at room temperature giving isotactic-enriched PLA.

Stable iridium(iv) complexes supported by tetradentate salen ligands. Synthesis, structures and reactivity

2019 ◽  
Vol 55 (25) ◽  
pp. 3606-3609 ◽  
Author(s):  
Chi Lun Lee ◽  
Liangliang Wu ◽  
Jie-Sheng Huang ◽  
Chi-Ming Che
Keyword(s):  
Crystal Structures ◽  
Catalytic Properties ◽  
Aryl Azides ◽  
X Ray ◽  
Salen Complexes ◽  
Salen Ligands

Here we report the synthesis, spectroscopy and X-ray crystal structures of mononuclear trans-dichloroiridium(iv)–salen complexes and their catalytic properties for intramolecular C–H amination of aryl azides.

Distorted copper(ii) radicals with sterically hindered salens: electronic structure and aerobic oxidation of alcohols

2020 ◽  
Vol 49 (37) ◽  
pp. 12990-13002
Author(s):  
R. Kunert ◽  
C. Philouze ◽  
F. Berthiol ◽  
O. Jarjayes ◽  
T. Storr ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Aerobic Oxidation ◽  
Phenoxyl Radical ◽  
Redox States ◽  
Salen Complexes ◽  
Oxidation Of Alcohols ◽  
Sterically Hindered ◽  
Unique Stability

Strongly distorted copper salen complexes show a unique stability in four different redox states by CV. Copper phenoxyl radical complexes are structurally characterized. They promote the catalytic aerobic oxidation of 2-phenylethanol under air.

Substituent changes in the salen ligands of CuIINaI-complexes to induce various structures and catalytic activities towards 2-imidazolines from nitriles and 1,2-diaminopropane

2019 ◽  
Vol 55 (32) ◽  
pp. 4619-4622
Author(s):  
Quan-Quan Li ◽  
Peng-Xiu He ◽  
Jin Zhang ◽  
Ji-Dong Zhang ◽  
Yu-Meng Xin ◽  
...  
Keyword(s):  
Catalytic Activities ◽  
Salen Complexes ◽  
Salen Ligands ◽  
First Time

We, for the first time, describe the effect of different salen substituents on the synthesis of 2-imidazolines catalyzed by CuIINaI-salen complexes.

Redox Chemistry of Nickel Complexes in Aqueous Solutions

ChemInform ◽  
2005 ◽  
Vol 36 (37) ◽  
Author(s):  
Israel Zilbermann ◽  
Eric Maimon ◽  
Haim Cohen ◽  
Dan Meyerstein
Keyword(s):  
Aqueous Solutions ◽  
Nickel Complexes ◽  
Redox Chemistry

Novel dioxolene nickel complexes with sterically hindered diazabutadienes. Coupling of aza-ligands coordinated to nickel

2019 ◽  
Vol 48 (28) ◽  
pp. 10516-10525 ◽  
Author(s):  
Michael P. Bubnov ◽  
Vladimir K. Cherkasov ◽  
Irina A. Teplova ◽  
Nickolay O. Druzhkov ◽  
Ivan D. Grishin ◽  
...  
Keyword(s):  
Nickel Complexes ◽  
Methyl Group ◽  
Sterically Hindered

Coupling of nickel complexes containing N,N′-disubstituted-2,3-dimethyl-1,4-diazabutadiene-1,3 occurs through the methyl group of the latter in nonpolar media in the presence of free o-quinone.

Synthesis of New Chiral Mn(III)-Salen Complexes as Recoverable and Reusable Homogeneous Catalysts for Asymmetric Epoxidation of Styrenes and Chromenes

2021 ◽  
Author(s):  
Pooja Chaudhary ◽  
Geeta Devi Yadav ◽  
Krishna K. Damodaran ◽  
Surendra Singh
Keyword(s):  
Aerobic Oxidation ◽  
Inert Atmosphere ◽  
Asymmetric Epoxidation ◽  
Homogeneous Catalysts ◽  
Salen Complexes ◽  
Salen Ligands

New chiral Mn(III)-salen complexes 1a-e and 2a-e were synthesized from the reaction of C2-symmetric chiral salen ligands and Mn(CH3COO)2.4H2O under an inert atmosphere followed by aerobic oxidation. These complexes were...

Oxidizing Intermediates from the Sterically Hindered Iron Salen Complexes Related to the Oxygen Activation by Nonheme Iron Enzymes

2005 ◽  
Vol 44 (22) ◽  
pp. 8156-8166 ◽  
Author(s):  
Takuya Kurahashi ◽  
Yoshio Kobayashi ◽  
Shigenori Nagatomo ◽  
Takehiko Tosha ◽  
Teizo Kitagawa ◽  
...  
Keyword(s):  
Oxygen Activation ◽  
Nonheme Iron ◽  
Nonheme Iron Enzymes ◽  
Salen Complexes ◽  
Iron Enzymes ◽  
Sterically Hindered

scholarly journals Less hindered ligands give improved catalysts for the nickel catalysed Grignard cross-coupling of aromatic ethers

2018 ◽  
Vol 8 (1) ◽  
pp. 328-334 ◽  
Author(s):  
Gavin J. Harkness ◽  
Matthew L. Clarke
Keyword(s):  
Nickel Complexes ◽  
Cross Coupling ◽  
Grignard Reagents ◽  
Sterically Hindered

The challenging reaction of unactivated ortho-substituted aromatic ethers with Grignard reagents has been found to be most effectively catalysed using nickel complexes of less sterically hindered ligands.

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