Oxygen as oxidizing agent

Recent investigation of this reaction indicates that the C-H bond activation necessary for the reaction with CO can also be achieved using metal catalysts [138]. It is surprising that again the Rh/I system was found to be an active catalyst, if the reaction was carried out in water with oxygen as oxidation agent [139], Ethane has also been used as a source for acetic acid [141],... 

Liquid-phase oxidations of alcohols in the presence of supported metal catalysts are potentially very attractive reactions for the preparation of intermediates and fine chemieals because high selectivities can be obtained with environmentally clean processes. Indeed, they proceed under mild conditions, with molecular oxygen as oxidizing agent and water as solvent. Supported catalysts, based mainly on platinum-group metals, are resistant to leaching, are recyclable, and are readily available from catalyst manufacturers in various compositions and forms. 

Admixtures of oxygen or oxidizing agents such as N2O to the silane plasma enable the deposition of Si02 films. Other Si-containing compounds such as SiCl or tetraethoxysilane (Si(OCH2CH2)4) are used for plasma-enlranced Si02 deposition at lower temperatures [33],... 

Peroxides — Compounds containing the ion are hazardous primarily as oxidizing agents but also as water reactives. An example is the liberation of oxygen... 

Because ozonides are active oxygen compds, they can be used as oxidizing agents, polymerization catalysts, bleaching agents, and germicides. 

The oxidative coupling of CO in the presence of an alcohol to yield oxalate esters is under study by Ube Industries and Union Carbide. As oxidizing agent, oxygen or nitric oxide (Equation 8 and 9) can be used in the presence of a palladium catalyst (7 ). 

Coalification occurs under conditions which are more anaerobic than those used in the laboratory work and are less favorable for microorganisms. The oxygen tension is lower and decreases with time. More and more oxygen-containing compounds must serve as oxidizing agents. Temperature and pressure increase, and time begins to play an important role. 

Dihydro-1,2,4,5-tetrazines with unsubstituted nitrogens are easily oxidized to 1,2,4,5-tetrazines. This oxidation is part of most preparative methods for the synthesis of the tetrazines. As oxidizing agents nitrous acid, nitric acid, oxygen, halogens, iron(III) chloride, hydrogen peroxide and lead tetraacetate have been used (78HC(33)1075, p. 1077). 

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