Nitrogen sesquioxide

Nitrogen sesquioxide, N2Og (Also called dinitrogen trioxide), is formed by equimolar reaction of NO and N02. This oxide is, in turn, in equilibrium with the quite unstable nitrous acid, HN02, in the presence of water ... 

Nitrous anhydride (nitrogen sesquioxide), N2O3, is obtained by the reduction of nitric acid by heating with starch or arsenic oxide, AS2O3... 

Methylene groups in the a positions with respect to carboxylic groups are changed to carbonyl groups thus oi-keto esters are formed. Methyl phenylacetate is oxidized with air in the presence of cobalt benzoate at 110-115 °C to methyl phenylglyoxylate in 86% yield [8], Diethyl malonate is converted by nitrogen sesquioxide (N2O3) into diethyl mesoxalate in 74-76% yield [450],... 

Chemistry Practical Application Nitrogen Sesquioxide (N203)... 

In an alternative industrial process, resorcinol [108-46-3] is autoclaved with ammonia for 2—6 h at 200—230°C under a pressurized nitrogen atmosphere, 2.2—3.5 MPa (22—35 atm). Diammonium phosphate, ammonium molybdate, ammonium sulfite, or arsenic pentoxide maybe used as a catalyst to give yields of 60—94% with 85—90% selectivity for 3-aminophenol (67,68). A vapor-phase system operating at 320°C using a siUcon dioxide catalyst impregnated with gallium sesquioxide gives a 26—31% conversion of resorcinol with a 96—99% selectivity for 3-aminophenol (69). 

A mixture of sulfur dioxide. S02. and sulfur vapor, at low pressure and with an electric discharge, forms sulfnr monoxide, SO Its presence is shown from its absorption spectrum, but upon separation it dispropor-tionates at once to sulfur and S02. Sulfur sesquioxide. S2Ojt, is formed by reaction of powdered sulfur with anhydrous SO3 S20 also dispropor-tionates (at 20°C in nitrogen) to sulfur and S02, Sulfur dioxide, S02, is... 

Nitrates of molybdenum are not kno-wn. Bj digesting dilute nitric acid with excess of molybdenum, or -with the hydrate of molybdenum dioxide or sesquioxide, a dark bro-wn solution is obtained, wliich on further evaporation yields oxides of nitrogen and moiybdic acid. 

In a recent review Gasgnier (1980) has discussed the problem of the existence of Ln-monoxides in the bulk phase. He showed conclusively that the experimental results invoked to indicate the formation of solid state Ln-monoxides can either be attributed to bulk dihydrides or to partial substitution of nitrogen instead of oxygen in the sesquioxides (Felmlee and Eyring, 1968 Work and Eick, 1972). Thus, with the exception of EuO, the existence of solid Ln-monoxides has been denied. The question, however, arises what happens during the initial stages of rare earth metal oxidation, when kinetic effects dominate the behavior of the rare earth-oxygen system ... 

Darnell (1978) has reported the formation of a carbon-oxygen compound R2CO with rare earths Ce, Sm, Eu, Gd, Tm and Yb by heating the metals in a quartz tube with a stoichiometric amount of CO to 800°C. The crystal structure of these compounds was observed to be similar to the NaCl structure of the corresponding nitrides (the nitrogen in the metal nitrides being replaced alternately by carbon and oxygen). Only traces of the sesquioxide phase were detected by X-ray diffraction. 

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