Electric Literature of 13031-04-4, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 13031-04-4, molcular formula is C6H8O3, introducing its new discovery.
Aminolactone chiral modifiers for heterogeneous asymmetric hydrogenation: Corrected structure of pantoyl-naphthylethylamine, in-situ hydrogenolysis, and scanning tunneling microscopy observation of supramolecular aminolactone/ substrate assemblies on Pt(111)
As established by Baiker and co-workers, pantoyl-naphthylethylamine (PNEA) is an efficient synthetic chiral modifier for the asymmetric hydrogenation of ketopantolactone (KPL) to pantolactone on supported Pt catalysts. We report a scanning tunneling microscopy (STM) study of PNEA and PNEA-derived aminolactone species on Pt(111) and a reassignment of the relative stereochemistry of the modifier. Robust organic chemistry methods were used to establish that the structure of PNEA is R,S rather than R,R. The dissociative chemisorption of a fraction of PNEA adsorbed on Pt(111) yields two fragments that we attribute to a process involving C-N bond scission. We show that C-N bond scission occurs under hydrogenation conditions on PNEA-modified Pt/Al2O3 catalysts, forming the aminolactone amino-4,4-dimethyldihydrofuran-2-one (AF). STM measurements on (S)-AF and 2,2,2-trifluoroacetophenone coadsorbed on Pt(111) show the formation of isolated 1:1 complexes. In contrast, measurements on coadsorbed (S)-AF and KPL show fluxional supramolecular AF/KPL assemblies. The possibility that such assemblies contribute to the overall enantioselectivity observed for PNEA-modified Pt catalysts is discussed.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 13031-04-4 is helpful to your research. Electric Literature of 13031-04-4
Reference£º
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem