N-Heterocyclic Carbene (NHC)-Stabilized Ru0 Nanoparticles: In Situ Generation of an Efficient Transfer Hydrogenation Catalyst was written by Kathuria, Lakshay;Din Reshi, Noor U.;Samuelson, Ashoka G.. And the article was included in Chemistry – A European Journal in 2020.Related Products of 1632-83-3 This article mentions the following:
Tethered and untethered ruthenium half-sandwich complexes I [R = 2,4,6-(CH3)3, 4-i-Pr, H, 3-Me, etc.; n = 1, 2] and II were synthesized and characterized spectroscopically. X-ray crystallog. anal. of three untethered I (n = 1, R = 3-OMe; n = 1, R = 4-i-Pr; n = 1, R = 4-NO2) and two tethered Ru N-heterocyclic carbene (NHC) complexes II (R = 3-OMe, 2,4,6-(CH3)3) were also carried out. These RuNHC complexes catalyze transfer hydrogenation of aromatic ketones as acetophenone, 2,3-dihydro-1H-inden-1-one, 1-(furan-2-yl)ethan-1-one, etc. in 2-propanol under reflux, optimally in the presence of (25 mol%) KOH. Under these conditions, the formation of 2-3 nm-sized Ru0 nanoparticles was detected by TEM measurements. A solid-state NMR investigation of the nanoparticles suggested that the NHC ligands were bound to the surface of the Ru nanoparticles (NPs). This base-promoted route to NHC-stabilized ruthenium nanoparticles directly from arene-tethered ruthenium-NHC complexes and from untethered ruthenium-NHC complexes is more convenient than previously known routes to NHC-stabilized Ru nanocatalysts. Similar catalytically active RuNPs were also generated from the reaction of a mixture of [RuCl2(p-cymene)]2 and the NHC precursor with KOH in isopropanol under reflux. The transfer hydrogenation catalyzed by these NHC-stabilized RuNPs possess a high turnover number The catalytic efficiency was significantly reduced if nanoparticles were exposed to air or allowed to aggregate and precipitate by cooling the reaction mixtures during the reaction. In the experiment, the researchers used many compounds, for example, 1-Methylbenzimidazole (cas: 1632-83-3Related Products of 1632-83-3).
1-Methylbenzimidazole (cas: 1632-83-3) belongs to imidazole derivatives. Imidazole is a heterocyclic compound with a five-membered planar ring. It is amphoteric and highly polar. Many drugs contain an imidazole ring, such as certain antifungal drugs, the nitroimidazole series of antibiotics, and the sedative midazolam.Related Products of 1632-83-3
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem