Dinitrogen trioxide reactions

Dinitrogen trioxide reaction, with bulTer and/or halide catalysis. 

Schmid s observation of the dependence of the reaction rate on the square of the concentration of nitrous acid was interpreted by Hammett (1940, p. 294) as due to the rate-limiting formation of dinitrogen trioxide, N203. The consequent attack of the amine by N203 was postulated to be faster therefore the concentration of the amine has no influence on the overall rate (zero order with respect to amine). Similarly, Hammett regards the second factor of Schmid s equation for diazotization in the presence of hydrochloric or hydrobromic acid as the result of the formation of nitrosyl halide. 

The earliest reported Fxs were the result of the reaction of nitrous acid with naturally occurring alkenes being the identified intermediate a a-nitrooxime that suffers dehydration with cyclization. Apart from these conditions, the most recent Fxs synthesis descriptions have involved reactions between alkenes and dinitrogen trioxide (Fig. 3), nitroalkanes and aluminum trichlo-... 

The reaction in water at pH 7.4 has been much studied since the discovery of the importance of nitric oxide. The products are as for the thermal and photochemical reactions, except that the final product is nitrite ion. This is to be expected since nitric oxide in aerated water at pH 7.4 also yields quantitatively nitrite ion25, by it is believed the series of equations 7-9, which involves oxidation to nitrogen dioxide, further reaction to give dinitrogen trioxide which, in mildly alkaline solution, is hydrolysed to nitrite ion. Under anaerobic conditions it is possible to detect nitric oxide directly from the decomposition of nitrosothiols using a NO-probe electrode system26. Solutions of nitrosothiols both in... 

Dinitrogen pentoxide has also been synthesized from the reaction of ifitric oxide (NO) and dinitrogen trioxide (N2O3) with ozone. The reaction of nitric acid containing a trace of picric acid also yields dinitrogen pentoxide. ... 

Whenever a superficial modification is intended, keeping the graft copolymer in the same state of dispersion, special techniques can be employed, either creating active centers by high or low energy irradiation, or by chemical reactions with ozone, chlorine, bromine, dinitrogen trioxide or other reagents. 

The first isolation of nitrosonium ion 221 as a distinct species was in the reaction of dinitrogen trioxide and dinitrogen tetroxide with boron trifluoride531 [Eqs. (4.149) and (4.150)]. 

Dinitrogen trioxide is formed by the reaction of stoichiometric quantities of NO and 02 ... 

Only the general principles of these types of reactions are given here. The literature is replete with references to such reactions, but in most of them the established procedures previously reviewed are employed.1,2 A few variations are worthy of mention. Dinitrogen trioxide has very recently been used in place of hydroxylamine in reaction with a,/1-unsaturated ketones.7 The resulting pseudonitrosites (1), obtained in 17-42% yields, were thermally cyclized to 3,5-diaryl-4-nitroisoxazoles (2). 

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 ... 

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