Copper peroxide

Tolstoi, V. P. Molotkina, E. V. 1994. The synthesis of copper-peroxide nanolayers on silicon and fused-quartz surfaces by the ionic deposition technique.. Russ J. Inorg Chem. 39 372-374. 

Gilbert BC, Harrington G, Scrivens G, Silvester S (1997) EPR studies of Fenton-type reactions in copper-peroxide. In Minisci F (ed) Free radicals in biology and environment. Kluwer, Dordrecht, pp 49-62... 

Cupric oxide reacts with CO at temperatures which are substantially higher than those at which manganese dioxide is effective. The use of copper oxide in the combustion of CO in gas analysis is well known. By itself, it is not an effective catalyst for the oxidation of CO at ordinary temperatures. It may, however, greatly increase the activity of other oxides when used in mixtures of the proper proportion. The early work of Hofmann (23) indicated that a previously prepared surface of CuO will oxidize a mixture of CO and air, but that the rate can be increased by a factor of 3 if the copper is moistened with a little alkali. The catalytic activity is further increased if a little iridium is incorporated in the oxide. It was thought that the oxidation of CO depended upon the formation of an unstable copper peroxide of the composition, Cu203 or Cu02, which reacted with CO to form C02 and CuO. The principle was proposed for a gas generator cell of the type O/Cu/alkali/Cu/CO. The reaction was, however, too slow to be of practical importance. 

Copper-peroxide chemistry is also capable of generating a potent oxidant (16, 17). Addition of H202 to Cu(phen)2+ generates a novel oxidant according to equation 5 ... 

Fig. 34. Copper d orbital and peroxide n orbital splitting diagram for a copper-peroxide monomer intensity of the charge transfer transition, based on orbital overlap considerations, is indicated by width of the arrows...

Copper peroxide, Cu02,H20.—At 0° C. neutral hydrogen peroxide converts an aqueous suspension of cupric hydroxide into the brown,... 

Tolman and co-workers reported dioxygen activation at a single copper site (Equation 11.53) [116]. The existence of the copper peroxide species was supported by both experimental and computational studies. 

Peroxide of copper 409S CUO2.H2O Copper peroxide. 

In fact, when 4-carbomethoxy-phenolate is allowed to react with [Cu2(L66)(02)] at -60° C in acetone the reaction takes place with replacement of the 362 nm peroxo band with a weaker band near 340 nm, which is characteristic of the corresponding catecholate adduct of [Cu2(L66)] (Scheme 9), previously reported by our group 136). The conversion of the phenolate to catecholate (in 40 % yield with respect of the dioxygen adduct, using a stoichiometric amount of 4-carbomethoxy-phenolate with respect to the complex) has been also proven by workup of the reaction mixture. The oxidation of 3,5-di- cr -butyl-catechol to the quinone by [Cu2(L66)(02)] was also studied at low temperature (Scheme 9). In this case, the decrease of the copper-peroxide band at 362 nm and the development of the quinone band at 420 nm follow the same time profile ( obs = 2.8 x 10 s and... 

Although the range of useable additives is quite large, all additives have to be chosen and tested carefully. Anaerobics can be destabilised by certain types of impurities, for example, traces of transition metals (e.g., iron or copper), peroxides and amines. 

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