74065-63-7Relevant articles and documents
A catalytic palladium active-metal template pathway to [2]rotaxanes
Berna, Jose,Crowley, James D.,Goldup, Stephen M.,Haenni, Kevin D.,Lee, Ai-Lan,Leigh, David A.
, p. 5709 - 5713 (2007)
(Chemical Equation Presented) A multitasking template: [2]Rotaxanes have been synthesized with the help of a palladium active-metal template, which acts as both a template for threading and a catalyst for covalent-bond formation (see scheme). The synthesi
Phosphonate-Mediated Immobilization of Rhodium/Bipyridine Hydrogenation Catalysts
Forato, Florian,Belhboub, Anouar,Monot, Julien,Petit, Marc,Benoit, Roland,Sarou-Kanian, Vincent,Fayon, Franck,Jacquemin, Denis,Queffelec, Clémence,Bujoli, Bruno
, p. 2457 - 2465 (2018/02/06)
RhL2 complexes of phosphonate-derivatized 2,2′-bipyridine (bpy) ligands L were immobilized on titanium oxide particles generated in situ. Depending on the structure of the bipy ligand—number of tethers (1 or 2) to which the phosphonate end groups are attached and their location on the 2,2′-bipyridine backbone (4,4′-, 5,5′-, or 6,6′-positions)—the resulting supported catalysts showed comparable chemoselectivity but different kinetics for the hydrogenation of 6-methyl-5-hepten-2-one under hydrogen pressure. Characterization of the six supported catalysts suggested that the intrinsic geometry of each of the phosphonate-derivatized 2,2′-bipyridines leads to supported catalysts with different microstructures and different arrangements of the RhL2 species at the surface of the solid, which thereby affect their reactivity.
Correlation between the Structure and Catalytic Activity of [Cp*Rh(Substituted Bipyridine)] Complexes for NADH Regeneration
Ganesan, Vinothkumar,Sivanesan, Dharmalingam,Yoon, Sungho
supporting information, p. 1366 - 1374 (2017/02/15)
A series of water-soluble half-sandwich [Cp*RhIII(N^N)Cl]+ (Cp* = pentamethylcyclopentadiene, N^N-substituted 2,2′-bipyridine) complexes containing electron-donating substituents around the 2,2′-bipyridyl ligand were synthesized and fully characterized for the regioselective reduction of nicotinamide coenzyme (NAD+). The influence of the positional effect of the substituents on the structural, electrochemical, and catalytic properties of the catalyst was systematically studied in detail. The catalytic efficiency of the substituted bipyridine Cp*RhIII complexes are inversely correlated with their redox potentials. The 5,5′-substituted bipyridine Cp*RhIII complex, which had the lowest reduction potential, most effectively regenerated NADH with a turnover frequency of 1100 h-1. Detailed kinetic studies on the generation of intermediate(s) provide valuable mechanistic insight into this catalytic cycle and help to direct the future design strategy of corresponding catalysts.
Csp2-Br bond activation of Br-pyridine by neophylpalladacycle: Formation of binuclear seven-membered palladacycle and bipyridine species
Nicasio-Collazo, Juan,Wrobel, Katarzyna,Wrobel, Kazimierz,Serrano, Oracio
supporting information, p. 8729 - 8733 (2017/08/29)
In this work, the synthesis and reactivity of seven-membered palladacycles are described, and a novel bi-pyridine synthesis in a catalytic pathway is reported. Neophyl-palladacycle(i) reacts with an excess of 2-Br-pyridine, giving the desired new binuclear seven-membered palladacycle (1) and unexpectedly, a bipyridine complex, [Pd(BiPy)Br2]. ESI-HRMS experiments show that fragmentation of the Pd-Br bond in 1 can take place producing unusual two coordinated Pd(ii) molecular ions, [Pd(NeoPyR)]+.