Nitric oxide with chlorine

Fig. 5-1. Reaction of chlorine with nitric oxide tf[CINO]/

Nitrosyl chloride can be obtained by direct combination of chlorine with nitric oxide, by the reaction of NOHSO4 or NaNOj with HCl, or as a by-product in the preparation of KNOs from KCl and NO2, in which KCl is moistened with 2.4% water. Nitrosyl bromide is usually prepared by direct combination of bromine nuth nitric oxide. Nitrosyl chloride and nitrosyl bromide can be prepared by reacting the appropriate potassium halide with nitrogen dioxide at room temperature. The reaction rate increases with increased size of the halide, and NOCl and NOBr can be obtained in a reasonable length of time by powdering the halide salt before adding NO. ... 

Especial care is required when working with the following much used substances hydrocyanic add, phosgene, dimethyl sulphate, the lower add chlorides, chlorine, bromine, nitric oxide and nitrogen peroxide, carbon monoxide, sodium, and potassium. Large scale operations with these should be carried out in a special room in any case always in a good fume chamber. 

In summary the concentration of ozone in the polluted atmosphere is controlled by the intensity of sunlight and the ratio of nitrogen dioxide to nitric oxide. Hydrocarbons and other pollutants—such as aldehydes, ketones, chlorinated hydrocarbons, and carbon monoxide—react to form peroxy radicals. These, in turn, react with nitric oxide, causing the ratio [NOjjilNO] to increase. As a consequence of Equation 2-5, the ozone concentration also increases. 

At low concentrations of chlorine, dimeric nitrosoalkanes free from chlorine are produced when alkanes are treated also with nitric oxide. Under these circumstances, molecular chlorine is first converted into atomic chlorine which attacks the alkane to form alkyl radicals and hydrogen chloride. The alkyl radicals, in turn, form nitrosoalkanes with nitric oxide. This reaction is most effectively carried out when the ultraviolet radiation is between 380 and 420 mp. [43, 56],... 

The action oi chlorine on nitric oxide yields an orange-red gas, nitrosyl chloride> NOCh Its structural formula may be represented as Cl—N—O it is thus the acid chloride (Chap. 14) of nitrous acid. Upon treatment with water, therefore, it yields nitrous acid and hydrochloric acid ... 

By passing chloropicrin in the vapour state through a red-hot tube of quartz or porcelain, it decomposes with formation of chlorine and nitric oxide, while hexachloroethane deposits on the cold part of the tube. ... 

TETROXIDO de NITOGENO (Spanish) (10544-72-6) Noncombustible, but supports combustion of combustible materials. A powerful oxidizer. Water contact produces nitric acid and nitric oxide. Incompatible with nitric oxide reacts with air, producing additional nitrogen tetroxide. Violent reaction with strong reducing agents, anhydrous ammonia, alcohols, barium oxide, boron trichloride, carbon disulfide, chlorinated hydrocarbons, cyclohexane, difluoro-trifluoromethylphosphine, dimethyl sulfoxide, formaldehyde, ethers, fluorine, formaldehyde, halocarbons, hydrocarbons, metal acetylides, metal carbides, metal powders, metal carbonyls. 

The startii materials are NOCl, free of chlorine and nitric oxide, 2 to 4 g. of which is sealed into ampoules with break-off ends, and anhydrous KNCS, somewhat less than stoichiometrically required for reaction with the NOCl (1 g. of NOCl is equivalent to 1.484 g. of KNCS). About 25 ml. of liquid SOg per g. of NOCl (the SOg is dried over PsOg) is used as the solvent. Finally, a high-vacuum apparatus must be available, to which the... 

An oxidizing acid can, at the same time, oxidize the chloride to produce molecular chlorine. With nitric acid, for example,... 

Nitric oxide is an important intermediate in the production of nitric acid. Fluorine, chlorine, and bromine react with nitric oxide to form the corresponding nitrosyl halide. It is also used in making mixtures for calibration standards for stationary and mobile exhaust emission measurements. 

In the presence of the catalyst bromine, chlorine reacts with nitric oxide to give nitrosyl chloride... 

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