Unusual non-bifunctional mechanism for Co-PNP complex catalyzed transfer hydrogenation governed by the electronic configuration of metal center

2015 ◽  
Vol 44 (37) ◽  
pp. 16573-16585 ◽  
Author(s):  
Cheng Hou ◽  
Jingxing Jiang ◽  
Yinwu Li ◽  
Zhihan Zhang ◽  
Cunyuan Zhao ◽  
...  
Keyword(s):  
Electronic Configuration ◽  
Metal Center ◽  
Transfer Hydrogenation ◽  
Bifunctional Catalysts ◽  
Bifunctional Mechanism

The unusual non-bifunctional mechanism for CoII-PNP catalyzed transfer hydrogenation is revealed to be governed by the electronic configuration of the metal center, which is different from traditional bifunctional catalysts.

The origin of different driving forces between O–H/N–H functional groups in metal ligand cooperation: mechanistic insight into Mn(i) catalysed transfer hydrogenation

2020 ◽  
Vol 10 (1) ◽  
pp. 169-179 ◽  
Author(s):  
Li Zhou ◽  
Datai Liu ◽  
Haiyi Lan ◽  
Xiujian Wang ◽  
Cunyuan Zhao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Functional Groups ◽  
Driving Forces ◽  
Transfer Hydrogenation ◽  
Bifunctional Catalysts ◽  
Mechanistic Insight ◽  
Insight Into ◽  
Metal Ligand

The origin of different catalytic activity between two structurally similar Lewis basic bifunctional catalysts.

Asymmetric transfer hydrogenation of prochiral ketones in aqueous media with chiral water-soluble and heterogenized bifunctional catalysts of the RhCp*-type ligand

Chirality ◽  
2010 ◽  
Vol 23 (2) ◽  
pp. 178-184 ◽  
Author(s):  
Angélica Barrón-Jaime ◽  
Oscar F. Narvaez-Garayzar ◽  
Jorge González ◽  
Valentín Ibarra-Galván ◽  
Gerardo Aguirre ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Water Soluble ◽  
Transfer Hydrogenation ◽  
Bifunctional Catalysts ◽  
Asymmetric Transfer Hydrogenation ◽  
Prochiral Ketones

Transfer Hydrogenation in Water via a Ruthenium Catalyst with OH Groups near the Metal Center on a bipy Scaffold

2011 ◽  
Vol 30 (23) ◽  
pp. 6339-6342 ◽  
Author(s):  
Ismael Nieto ◽  
Michelle S. Livings ◽  
John B. Sacci ◽  
Lauren E. Reuther ◽  
Matthias Zeller ◽  
...  
Keyword(s):  
Ruthenium Catalyst ◽  
Metal Center ◽  
Transfer Hydrogenation ◽  
Oh Groups

scholarly journals Recyclable Zr/Hf-Containing Acid-Base Bifunctional Catalysts for Hydrogen Transfer Upgrading of Biofuranics: A Review

2021 ◽  
Vol 9 ◽  
Author(s):  
Yixuan Liu ◽  
Xixi Liu ◽  
Mingrui Li ◽  
Ye Meng ◽  
Jie Li ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
Hydrogen Transfer ◽  
Precious Metals ◽  
Renewable Resource ◽  
Transfer Hydrogenation ◽  
Bifunctional Catalysts ◽  
Acid Base ◽  
One Pot ◽  
Catalytic Material ◽  
Metal Organic

The massive burning of a large amount of fossil energy has caused a lot of serious environmental issues (e.g., air pollution and climate change), urging people to efficiently explore and valorize sustainable alternatives. Biomass is being deemed as the only organic carbon-containing renewable resource for the production of net-zero carbon emission fuels and fine chemicals. Regarding this, the selective transformation of high-oxygen biomass feedstocks by catalytic transfer hydrogenation (CTH) is a very promising strategy to realize the carbon cycle. Among them, the important Meerwein-Ponndorf-Verley (MPV) reaction is believed to be capable of replacing the traditional hydrogenation strategy which generally requires high-pressure H2 and precious metals, aiming to upgrade biomass into downstream biochemical products and fuels. Employing bifunctional heterogeneous catalysts with both acidic and basic sites is needed to catalyze the MPV reaction, which is the key point for domino/cascade reaction in one pot that can eliminate the relevant complicated separation/purification step. Zirconium (Zr) and hafnium (Hf), belonging to transition metals, rich in reserves, can demonstrate similar catalytic efficiency for MPV reaction as that of precious metals. This review introduced the application of recyclable heterogeneous non-noble Zr/Hf-containing catalysts with acid-base bifunctionality for CTH reaction using the safe liquid hydrogen donor. The corresponding catalysts were classified into different types including Zr/Hf-containing metal oxides, supported materials, zeolites, metal-organic frameworks, metal-organic hybrids, and their respective pros and cons were compared and discussed comprehensively. Emphasis was placed on evaluating the bifunctionality of catalytic material and the key role of the active site corresponding to the structure of the catalyst in the MPV reaction. Finally, a concise summary and prospect were also provided centering on the development and suggestion of Zr/Hf-containing acid-base bifunctional catalysts for CTH.

Coordination of tetradentate X2N2 (X = P, S, O) ligands to iron(ii) metal center and catalytic application in the transfer hydrogenation of ketones

2009 ◽  
pp. 1659 ◽  
Author(s):  
Antoine Buchard ◽  
Hadrien Heuclin ◽  
Audrey Auffrant ◽  
Xavier F. Le Goff ◽  
Pascal Le Floch
Keyword(s):  
Metal Center ◽  
Transfer Hydrogenation ◽  
Catalytic Application

scholarly journals The mechanism of enantioselective ketone reduction with Noyori and Noyori–Ikariya bifunctional catalysts

2016 ◽  
Vol 45 (16) ◽  
pp. 6756-6781 ◽  
Author(s):  
Pavel A. Dub ◽  
John C. Gordon
Keyword(s):  
Present Article ◽  
Enantioselective Hydrogenation ◽  
Current Level ◽  
Transfer Hydrogenation ◽  
Bifunctional Catalysts ◽  
Ketone Reduction ◽  
Aromatic Ketones ◽  
Level Of Understanding

The present article describes the current level of understanding of the mechanism of enantioselective hydrogenation and transfer hydrogenation of aromatic ketones with pioneering prototypes of bifunctional catalysts, the Noyori and Noyori–Ikariya complexes.

Some Problems in the Oxidative Addition and Binding of an Ethylene to a Transition Metal Center.

1987 ◽  
Vol 6 (4) ◽  
pp. 902-902
Author(s):  
Jerome Silestre ◽  
Maria Calhorda ◽  
Roald Hoffman ◽  
Page Stoutland ◽  
Robert Bergman
Keyword(s):  
Transition Metal ◽  
Oxidative Addition ◽  
Metal Center

Quantum-chemical analysis of small silver clusters

1987 ◽  
Vol 52 (7) ◽  
pp. 1652-1657 ◽  
Author(s):  
Grigorii V. Gadiyak ◽  
Yurii N. Morokov ◽  
Mojmír Tomášek
Keyword(s):  
Hard Spheres ◽  
Electronic Configuration ◽  
Close Packing ◽  
Basis Sets ◽  
Silver Clusters ◽  
Quantum Chemical Analysis ◽  
Spin Distribution ◽  
Spin Polarized ◽  
Atomic Silver ◽  
Equilibrium Geometries

Total energy calculations of three- and four-atomic silver clusters have been performed by the spin-polarized version of the CNDO/2 method to get the most stable equilibrium geometries, atomization energies, and charge and spin distribution on the atoms for three different basis sets: {s}, {sp}, and {spd}. When viewed from the equilateral triangle and square geometries, the last electronic configuration, i.e. the {spd} one, appears to be most stable with respect to the geometrical deformations considered. In this case, the behaviour of the atoms of both clusters resembles that of hard spheres (i.e. close-packing).

The First Coordination of an (α-Diazo)phosphine to a Transition-Metal Center

2003 ◽  
Vol 22 (7) ◽  
pp. 1358-1360 ◽  
Author(s):  
Emmanuelle Despagnet-Ayoub ◽  
Heinz Gornitzka ◽  
John Fawcett ◽  
Philip W. Dyer ◽  
Didier Bourissou ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Center
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