Catalytic activity of metal complexes fixed on a solid carrier. I. Palladium complexes deposited on ionites in hydrogenation reactions

1977 ◽  
Vol 26 (12) ◽  
pp. 2539-2542
Author(s):  
V. Z. Sharf ◽  
V. D. Kopylova ◽  
L. P. Karapetyan ◽  
E. L. Frumkina ◽  
L. Kh. Freidlin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Complexes ◽  
Palladium Complexes ◽  
Solid Carrier ◽  
Hydrogenation Reactions

Synthesis and investigation of new cyclic haloamidinium salts

2016 ◽  
Vol 71 (6) ◽  
pp. 667-676 ◽  
Author(s):  
Eduard Rais ◽  
Ulrich Flörke ◽  
René Wilhelm
Keyword(s):  
Catalytic Activity ◽  
Metal Complexes ◽  
Catalytic Reaction ◽  
Palladium Complexes ◽  
Molecular Structures ◽  
Cobalt Powder ◽  
Crystal And Molecular Structures ◽  
Metal Sources ◽  
Synthetic Routes

AbstractThe presented work describes the synthesis of new six- and seven-membered haloamidinium salts and their reaction with different metals. The isolated metal complexes were tested in a catalytic reaction. Two different synthetic routes were applied to prepare five different salts. Chloroamidinium salts were very water-sensitive in comparison to their corresponding bromoamidinium salts. Hence, the preparation of the less sensitive bromoamidinium salts was higher prioritized. The formed salts were converted with metal sources to N-heterocyclic carbene (NHC) metal complexes through an oxidative insertion into the C–X bond. This type of formation is less examined for the synthesis of extended NHC metal complexes. Pd(PPh3)4 and cobalt powder were applied as metal sources, whereby two palladium complexes were isolated, characterized, and their crystal and molecular structures determined. The palladium complexes were investigated in the Suzuki-Miyaura reaction and showed promising catalytic activity.

scholarly journals Immobilization of an Iridium(I)-NHC-Phosphine Catalyst for Hydrogenation Reactions under Batch and Flow Conditions

Catalysts ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 656
Author(s):  
Henrietta Kovács ◽  
Krisztina Orosz ◽  
Gábor Papp ◽  
Ferenc Joó ◽  
Henrietta Horváth
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Heterogeneous Catalyst ◽  
Aqueous Phase ◽  
Levulinic Acid ◽  
Flow Reactor ◽  
High Catalytic Activity ◽  
Flow Conditions ◽  
Hydrogenation Reactions ◽  
Excellent Selectivity

Na2[Ir(cod)(emim)(mtppts)] (1) with high catalytic activity in various organic- and aqueous-phase hydrogenation reactions was immobilized on several types of commercially available ion-exchange supports. The resulting heterogeneous catalyst was investigated in batch reactions and in an H-Cube flow reactor in the hydrogenation of phenylacetylene, diphenylacetylene, 1-hexyne, and benzylideneacetone. Under proper conditions, the catalyst was highly selective in the hydrogenation of alkynes to alkenes, and demonstrated excellent selectivity in C=C over C=O hydrogenation; furthermore, it displayed remarkable stability. Activity of 1 in hydrogenation of levulinic acid to γ-valerolactone was also assessed.

Catalytic activity of chelating N-heterocyclic carbene palladium complexes towards selective phosphorylation of coumarins

2016 ◽  
Vol 818 ◽  
pp. 179-184 ◽  
Author(s):  
Liangru Yang ◽  
Xinchi Zhang ◽  
Jinwei Yuan ◽  
Yongmei Xiao ◽  
Pu Mao
Keyword(s):  
Catalytic Activity ◽  
Palladium Complexes

Polymer-Bound 1-Aryl-3-alkyltriazenes as Modular Ligands for Catalysis. Part 2: Screening Immobilized Metal Complexes for Catalytic Activity

2002 ◽  
Vol 12 (14) ◽  
pp. 1849-1851 ◽  
Author(s):  
Stefan Bräse ◽  
Stefan Dahmen ◽  
Frank Lauterwasser ◽  
Nicholas E. Leadbeater ◽  
Emma L. Sharp
Keyword(s):  
Catalytic Activity ◽  
Metal Complexes
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