Iron catalysis hydrogenation

Cyclopentadienone iron alcohol complexes like 37 were generated from the reactions of [2,5-(SiMe3)2-3,4-(CH2)4(ri -C4COH)]Fe(CO)2H (36) and aromatic aldehydes [47]. This process can be used for the iron-catalyzed hydrogenation of aldehydes (Fig. 18 and Fe-H Complexes in Catalysis ). 

Liao, C.J., Chung, T.L., Chen, W.L. and Kuo, S.L. (2007) Treatment of pentachlorophenol-contaminated soil using nano-scale zero-valent iron with hydrogen peroxide. Journal of Molecular Catalysis A Chemical, 265, 189—194. 

Iron catalysis in oxidation reactions with peroxides, both hydrogen peroxide and alkyl hydroperoxides, is frequently regarded as just a Haber-Weiss-type system where hydroxyl... 

Recently, iron catalysis gained general importance. Its catalytic chemistry has been summarized ([2] recent reviews [3, 4]). Iron(II) and iron(III) salts have a long history in radical chemistry. The former are moderately active in atom-transfer reactions as well as initiators for the Fenton reaction with hydrogen peroxide or hydroperoxides (reviews [5-12]). Important applications of this principle are the Kharasch-Sosnovsky reaction (the allylic oxidation of olefins) [13], which often... 

Low-Valent Iron Catalysis 1,5-Hydrogen Transfer/Kumada Coupling... 

The classical experiments of F. Fischer and H. Trupsch date back to 1922, when the CO hydrogenation over alkalized iron catalysis at high pressures (150 bar) and temperatures (400-4S0 C) was found to yield oxygen-containing products ( Synihol ) I8]. 

Fe-H-C-i Austenite/Austenite Type Weldments , Met Mater, 37(2), 61-67 (1999), translated from Kovove Mater. 37(2), 85-95 (1999) (Transport Phenomena, Theory, 10) [1999Sta] Stavinskaya, O.N., Shklovskaya, N.I., Some Features of Activation of Synthetic Carbons by Iron-Catalyzed Hydrogenation , Russ. J. Appl. Chem., 72(5), 783-787 (1999), translated from Zh. Prikl. Khim., 72(5), 751-755 (1999) (Experimental, Catalysis, Phys. Prop., 13) [2000Pil] Pilous, V., Foret, R., Stransky, K., Redistribution of Hydrogen in Steel Weldments Part II. Fe-... 

Keywords Alkyl C-H oxidation Aminopyridine ligands Bioinspired catalysis Hydrogen peroxide Iron coordination complexes Nonheme oxygenases Selectivity... 

A short review describes recent approaches to bifunctional iron catalysis of the hydrogenation of ketones. ... 

Recent developments on iron catalysis have shown the enormous potential of this metal in the reduction of carbonyl groups with hydrogen or using transfer hydrogen and silanes as reducing agents [69]. However, the use of well-defined iron-NHC complexes as catalysts for these reduction processes is rather undeveloped [72]. 

Nitrogen-directed C—H activation to form C—C bonds like aryl-aryl is a relatively recent class of reactions. In 2008, Nakamura and coworkers presented the first report of an iron-catalyzed C—H arylation reaction—a homogeneous iron catalysis featuring C—C bond formation via C—H activation. As an overall synthetic transformation, it was a formal nucleophilic displacement of the ort/ o-hydrogen atom by... 

The mechanism and rate of hydrogen peroxide decomposition depend on many factors, including temperature, pH, presence or absence of a catalyst (7—10), such as metal ions, oxides, and hydroxides etc. Some common metal ions that actively support homogeneous catalysis of the decomposition include ferrous, ferric, cuprous, cupric, chromate, dichromate, molybdate, tungstate, and vanadate. For combinations, such as iron and... 

Keywords Catalysis Electrochemical reduction Hydroboration Hydrogenation Hydrosilylation Iron hydride complex Photochemical reduction... 

Supported iron catalysts are notoriously difficult to reduce [6-8] and thus a substantial fraction of the iron can be expected to remain inactive for the catalysis of hydrogenation. Particular attention has therefore been paid to the preparation of Fe/MgO catalysts by several different methods and examination of their effectiveness in producing metallic iron of adequate specific surface area after reduction in hydrogen. The activity and selectivity for primary amine formation have been determined for the hydrogenation of ethanenitrile (acetonitrile) and propanenitrile. 

In the same way, the detonation of moist trichloroethylene, which had been stored in a metal container, was explained by the hydrogen chloride formed. In this case it is possible to suggest another cause, which would involve iron trichloride forming by the interaction of hydrogen chloride with rust traces, and the catalysis by this salt of a polymerisation or degradation of the chlorinated derivative (see the similar case of aluminium chloride on p.281). 

Indeed, when present in concentrations sufficient to overwhelm normal antioxidant defences, ROS may be the principal mediators of lung injury (Said and Foda, 1989). These species, arising from the sequential one-electron reductions of oxygen, include the superoxide anion radical, hydrogen peroxide, hypochlorous ions and the hydroxyl radical. The latter species is thought to be formed either from superoxide in the ptesence of iron ions (Haber-Weiss reaction Junod, 1986) or from hydrogen peroxide, also catalysed by ferric ions (Fenton catalysis Kennedy et al., 1989). 

Guczi, L., Stefler, G., Geszti, O., Koppany, Zs., Molnar, E., Urban, M., and Kiricsi, I. 2006. CO hydrogenation over cobalt and iron catalysts supported over multiwall carbon nanotubes Effect of preparation. Journal of Catalysis 244 24—32. 

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