Equations Nitrogen peroxide

Formation.—When sulphur dioxide is passed into ice-cold fuming nitric acid, crystals of nitrosulphonic. acid separate.1 The acid is also obtained when sulphuric acid is treated with excess of nitrogen peroxide.2 It is also formed by the interaction of sulphur dioxide and nitrogen peroxide both in the absence or presence of water,8 and by the addition in equimolecular proportion of liquid nitrogen tetroxide to chloro-sulphonic acid in the absence of moisture.4 Sulphuric acid acts on either nitrous anhydride or nitrosyl chloride with formation of nitrosulphonic acid, according to the equations ... 

Discussion of Experiment 77. — The colorless gas is nitric oxide, the brown gas is nitrogen peroxide, and the blue solid is copper nitrate. The following equation is usually given as the simplest expression of the interaction of copper and nitric acid —... 

Again, in order that we may possess a knowledge of some systems, say gaseous nitrogen peroxide, not only must the variables given by the gas equation... 

The free-radical reaction may be equally initiated by photoactivated sulfur dioxide (3S02)442 (equation 79). On the other hand, polysulfones are obtained by radical copolymerization of appropriate olefins with sulfur dioxide443-449, and similarly, uptake of sulfur dioxide by a radical-pair formed by nitrogen extrusion from an azo compound yields the corresponding sulfone450 (equation 80). Correspondingly, alkylbenzenes, dibenzoyl peroxide, and sulfur dioxide yield sulfones under thermal conditions451... 

Sulphilimines (the nitrogen analogues of sulphoxides) may also be oxidized using hydrogen peroxide. In this case a sulphoximine (a nitrogen analogue of a sulphone) is produced in good yields, as shown in equation (11). 

It can be shown by 13C Fourier transform NMR spectroscopy at — 78 °C that a six-membered peroxide is an intermediate which disappears completely on warming, with formation of the observed reaction products. The extrusion of nitrogen from the six-membered peroxide yielded the four-membered peroxide (equation 25) accompanied by light emission103. 

The later is effective in oxidizing catechol to muconic add even under nitrogen (equation 28).1167 This reactive copper spedes172 has been variously formulated as a [Cu202]2- unit containing a superoxide or peroxide 02 unit,1169 which may then involve a postulated unit 1167... 

Actually the irradiation chemistry of even simple amino acids and peptides is much more complex than these equations imply, and many other radiochemical products have been reported (13, 14, 49). These include glyoxylic acid, formaldehyde, hydrogen peroxide, carbon dioxide, succinic acid, aspartic acid, diaminosuccinic acid, methylamine, methane, dimethyl mercaptan, a-aminobutyric acid, methionine sulfoxide, methinonine sul-fone, methionine sulfoxime, homocysteic acid, and several unidentified nitrogen compounds (46, 51). 

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