منابع مشابه
Photoemission study of Ce-catalyzed oxidation of W(110) and W(111).
Different catalytic oxidation effects of Ce on W(110) and W(111) were observed with photoemission spectroscopy. On Ce-covered W(110), the top W layer is quickly oxidized to a surface monoxide at room temperature. Oxidation is almost halted after the completion of one monolayer of WO. On Ce/W(111), instead of WO, WO3 grows on the surface under the same conditions. The monolayer suboxide formatio...
متن کاملTyrosinase-catalyzed oxidation of fluorophenols.
The activity of the type 3 copper enzyme tyrosinase toward 2-, 3-, and 4-fluorophenol was studied by kinetic methods and (1)H and (19)F NMR spectroscopy. Whereas 3- and 4-fluorophenol react with tyrosinase to give products that undergo a rapid polymerization process, 2-fluorophenol is not reactive and actually acts as a competitive inhibitor in the enzymatic oxidation of 3,4-dihydroxyphenylalan...
متن کاملDiastereoselective Ce(III)-Catalyzed Pinacol Couplings of Aldehydes
Aliphatic and aromatic aldehydes were converted into the corresponding pinacoles by using different cerium catalysts. Ce(OtBu)3 proved to be superior over other cerium(III) catalysts. Especially the highly diastereoselective pinacol coupling of sterically non demanding aldehydes such as hexanal is remarkable.
متن کاملBiomimetic flavin-catalyzed aldehyde oxidation.
The oxidation of alkyl and aryl aldehydes to their corresponding carboxylic acids has been achieved through the action of a biomimetic bridged flavin catalyst. The reaction uses readily available 35% aqueous hydrogen peroxide and is operationally simple. The oxidation is a green and sustainable reaction, obviating chlorinated solvents with minimal byproducts.
متن کاملCopper catalyzed oxidation of organozinc halides.
A wide range of organozinc substrates may be oxidized in the presence of catalytic copper to give carbon-carbon bonds in high yield.
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1990
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.42.1526