Additional Investigations of a New Kinetic Method To Follow Transition-Metal Nanocluster Formation, Including the Discovery of Heterolytic Hydrogen Activation in Nanocluster Nucleation Reactions

2001 ◽  
Vol 13 (2) ◽  
pp. 312-324 ◽  
Author(s):  
Jason A. Widegren ◽  
John D. Aiken ◽  
Saim Özkar ◽  
Richard G. Finke
Keyword(s):  
Transition Metal ◽  
Kinetic Method ◽  
Hydrogen Activation ◽  
Metal Nanocluster

Hydrogenation of Olefins, Alkynes, Allenes, and Arenes by Borane-based Frustrated Lewis Pairs

Synthesis ◽  
2021 ◽  
Author(s):  
Felix Wech ◽  
Urs Gellrich
Keyword(s):  
Transition Metal ◽  
Hydride Transfer ◽  
Lewis Base ◽  
Catalytic Reactions ◽  
Transfer Reactions ◽  
Organic Substrates ◽  
Frustrated Lewis Pairs ◽  
Hydrogen Activation ◽  
Hydrogenation Catalysts ◽  
Lewis Pairs

In recent years, borane-based frustrated Lewis pairs proved to be efficient hydrogenation catalysts and became an alternative to transition metal-based systems. The hydrogen activation by classic FLPs leads to a protonated Lewis base and a borohydride. Consequently, hydrogenations catalyzed by classic FLPs consist of stepwise hydride transfer reactions and protonations (or vice versa). More recently, systems that operate via an initial hydroboration have allowed extending the substrate scope for FLP catalyzed hydrogenations. Within this review, hydrogenations of organic substrates catalyzed by borane-based frustrated Lewis pairs are discussed. Emphasis is given to the mechanistic aspects of these catalytic reactions.

The effect of auxiliary ligand on the mechanism and reactivity: DFT study on H2 activation by Lewis acid–transition metal complex (tris(phosphino)borane)Fe(L)

2017 ◽  
Vol 7 (20) ◽  
pp. 4866-4878 ◽  
Author(s):  
Jianyu Zhang ◽  
Jiasheng Lin ◽  
Yinwu Li ◽  
Youxiang Shao ◽  
Xiao Huang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complex ◽  
Lewis Acid ◽  
Crucial Role ◽  
Transition Metal Complex ◽  
Dft Study ◽  
Dft Studies ◽  
Auxiliary Ligand ◽  
Hydrogen Activation

The crucial role of the auxiliary ligand in hydrogen activation is revealed by DFT studies for the LA–TM ferraboratrane complex.

scholarly journals Long‐Life Room‐Temperature Sodium–Sulfur Batteries by Virtue of Transition‐Metal‐Nanocluster–Sulfur Interactions

2019 ◽  
Vol 58 (5) ◽  
pp. 1484-1488 ◽  
Author(s):  
Bin‐Wei Zhang ◽  
Tian Sheng ◽  
Yun‐Xiao Wang ◽  
Shulei Chou ◽  
Kenneth Davey ◽  
...  
Keyword(s):  
Transition Metal ◽  
Room Temperature ◽  
Metal Nanocluster ◽  
Long Life ◽  
Sodium Sulfur

Carbon-hydrogen and hydrogen-hydrogen activation in transition metal complexes and on surfaces

1984 ◽  
Vol 106 (7) ◽  
pp. 2006-2026 ◽  
Author(s):  
Jean Yves Saillard ◽  
Roald Hoffmann
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Hydrogen Activation

Carbene-Based Lewis Pairs for Hydrogen Activation

2011 ◽  
Vol 64 (8) ◽  
pp. 1165 ◽  
Author(s):  
Jason W. Runyon ◽  
Oliver Steinhof ◽  
H. V. Rasika Dias ◽  
Joseph C. Calabrese ◽  
William J. Marshall ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hydrogen Storage ◽  
Lewis Acid ◽  
Hydrogen Gas ◽  
Acid Base ◽  
Base Pairs ◽  
Imidazolium Cation ◽  
Hydrogen Activation ◽  
Imidazolium Cations ◽  
Sterically Demanding

A series of Lewis acid–base pairs containing sterically demanding carbenes were investigated for hydrogen activation that could potentially be reversible for use in hydrogen storage applications. When electron-rich boranes are employed as electrophiles, the imidazolium cation is reduced to a 2H-imidazoline (aminal). The aminals were synthesized independently by reduction of imidazolium cations with strong reducing agents. Carbocations were also found to act as electrophiles for hydrogen activation. Preliminary results revealed that it is possible to reduce an alcohol to an alkane using hydrogen gas as a reducing agent in these systems. Finally, it was demonstrated that a transition metal can be used as an electrophile to activate hydrogen through heterolytic cleavage.

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