β‐Protic Pyrazole and N‐Heterocyclic Carbene Complexes: Synthesis, Properties, and Metal–Ligand Cooperative Bifunctional Catalysis

2011 ◽  
Vol 17 (13) ◽  
pp. 3542-3556 ◽  
Author(s):  
Shigeki Kuwata ◽  
Takao Ikariya
Keyword(s):  
Bifunctional Catalysis ◽  
Carbene Complexes ◽  
Synthesis Properties ◽  
Metal Ligand

scholarly journals Tuning Ruthenium Carbene Complexes for Selective P−H Activation through Metal‐Ligand Cooperation

2021 ◽  
Author(s):  
Kai‐Stephan Feichtner ◽  
Lennart T. Scharf ◽  
Thorsten Scherpf ◽  
Bert Mallick ◽  
Nils Boysen ◽  
...  
Keyword(s):  
Carbene Complexes ◽  
Metal Ligand

ChemInform Abstract: Asymmetric Hydrogenation Through Metal-Ligand Bifunctional Catalysis

ChemInform ◽  
2008 ◽  
Vol 39 (3) ◽  
Author(s):  
Ryoji Noyori ◽  
Takeshi Ohkuma ◽  
Christian A. Sandoval ◽  
Kilian Muniz
Keyword(s):  
Asymmetric Hydrogenation ◽  
Bifunctional Catalysis ◽  
Metal Ligand

ChemInform Abstract: Asymmetric Hydrogenation Through Metal-Ligand Bifunctional Catalysis

ChemInform ◽  
2010 ◽  
Vol 41 (38) ◽  
pp. no-no
Author(s):  
Ryoji Noyori ◽  
Takeshi Ohkuma ◽  
Christian A. Sandoval ◽  
Kilian Muniz
Keyword(s):  
Asymmetric Hydrogenation ◽  
Bifunctional Catalysis ◽  
Metal Ligand

Metal–ligand bifunctional catalysis for asymmetric hydrogenation

2005 ◽  
Vol 363 (1829) ◽  
pp. 901-912 ◽  
Author(s):  
Ryoji Noyori ◽  
Christian A Sandoval ◽  
Kilian Muñiz ◽  
Takeshi Ohkuma
Keyword(s):  
Asymmetric Catalysis ◽  
Asymmetric Hydrogenation ◽  
Enantioselective Hydrogenation ◽  
Molecular Surface ◽  
Metal Alkoxide ◽  
Bifunctional Catalysis ◽  
Bifunctional Mechanism ◽  
Prochiral Ketones ◽  
Membered Transition State ◽  
Metal Ligand

Chiral diphosphine/1,2-diamine–Ru(II) complexes catalyse the rapid, productive and enantioselective hydrogenation of simple ketones. The carbonyl-selective hydrogenation takes place via a non-classical metal–ligand bifunctional mechanism. The reduction of the C=O function occurs in the outer coordination sphere of an 18e trans -RuH 2 (diphosphine)(diamine) complex without interaction between the unsaturated moiety and the metallic centre. The Ru atom donates a hydride and the NH 2 ligand delivers a proton through a pericyclic six-membered transition state, directly giving an alcoholic product without metal alkoxide formation. The enantiofaces of prochiral ketones are differentiated on the chiral molecular surface of the saturated RuH 2 species. This asymmetric catalysis manifests the significance of ‘kinetic’ supramolecular chemistry.

Cooperative bond activation reactions with carbene complexes

2018 ◽  
Vol 54 (50) ◽  
pp. 6540-6553 ◽  
Author(s):  
Kai-Stephan Feichtner ◽  
Viktoria H. Gessner
Keyword(s):  
Bond Activation ◽  
Carbene Complexes ◽  
Recent Advances ◽  
Metal Ligand

This review highlights the recent advances in the application of carbene complexes in bond activation reactions via metal–ligand cooperation.

Metal—Ligand Bifunctional Catalysis for Asymmetric Hydrogenation

ChemInform ◽  
2006 ◽  
Vol 37 (24) ◽  
Author(s):  
Ryoji Noyori ◽  
Christian A. Sandoval ◽  
Kilian Muniz ◽  
Takeshi Ohkuma
Keyword(s):  
Asymmetric Hydrogenation ◽  
Bifunctional Catalysis ◽  
Metal Ligand

scholarly journals The inverse-trans-influence in tetravalent lanthanide and actinide bis(carbene) complexes

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Matthew Gregson ◽  
Erli Lu ◽  
David P. Mills ◽  
Floriana Tuna ◽  
Eric J. L. McInnes ◽  
...  
Keyword(s):  
Oxidation State ◽  
Theoretical Data ◽  
High Oxidation State ◽  
Carbene Complexes ◽  
Trans Influence ◽  
High Oxidation ◽  
High Valent ◽  
Tetravalent Cerium ◽  
Limited Scope ◽  
Metal Ligand

Abstract Across the periodic table the trans-influence operates, whereby tightly bonded ligands selectively lengthen mutually trans metal–ligand bonds. Conversely, in high oxidation state actinide complexes the inverse-trans-influence operates, where normally cis strongly donating ligands instead reside trans and actually reinforce each other. However, because the inverse-trans-influence is restricted to high-valent actinyls and a few uranium(V/VI) complexes, it has had limited scope in an area with few unifying rules. Here we report tetravalent cerium, uranium and thorium bis(carbene) complexes with trans C=M=C cores where experimental and theoretical data suggest the presence of an inverse-trans-influence. Studies of hypothetical praseodymium(IV) and terbium(IV) analogues suggest the inverse-trans-influence may extend to these ions but it also diminishes significantly as the 4f orbitals are populated. This work suggests that the inverse-trans-influence may occur beyond high oxidation state 5f metals and hence could encompass mid-range oxidation state actinides and lanthanides. Thus, the inverse-trans-influence might be a more general f-block principle.

scholarly journals Aromaticity in catalysis: metal ligand cooperation via ligand dearomatization and rearomatization

2021 ◽  
Author(s):  
Kuo-Wei Huang ◽  
Theo P Goncalves ◽  
Indranil Dutta
Keyword(s):  
Transition Metal ◽  
Transition Metal Catalysis ◽  
Bifunctional Catalysis ◽  
Conventional Model ◽  
Metal Catalysis ◽  
Metal Ligand

Unlike the conventional model of transition metal catalysis, ligands in metal–ligand cooperative (or bifunctional) catalysis are involved in the substrate activations. Such processes have offered unique mechanistic understandings and led...

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