Nitric oxide iodides

Nitric oxide is the simplest thermally stable odd-electron molecule known and, accordingly, its electronic structure and reaction chemistry have been very extensively studied. The compound is an intermediate in the production of nitric acid and is prepared industrially by the catalytic oxidation of ammonia (p. 466). On the laboratory scale it can be synthesized from aqueous solution by the mild reduction of acidified nitrites with iodide or ferrocyanide or by the disproportionation of nitrous acid in the presence of dilute sulfuric acid ... 

SfitJ AQQtrjtrj TIlC d ecompn prods were sepd by gas chromatography and identified by mass spectroscopy as N, nitric oxide, N dioxide, C monoxide, C dioxide, cyanogen iodide, and 1 (Ref 7)... 

N 14.15% a deep blue solid, liq, or gas. The color of the liq is described as that of a coned ammoniacal Cu soln (Ref 2). The odor is described as earthy or similar to sewage sludge (Ref 2). Mp -196.6°, bp -84° (Refs 1 2) CA Registry No 334-99-6 Preparation. It was first isolated as a by-prod from the fluorination of Ag cyanide. Its formation was attributed to the presence of Ag nitrate or Ag oxide in the tech grade Ag cyanide used (Ref 2). The first prepn in good yield was by the irradiation in a sealed tube of a mixt of nitric oxide and trifluoromethyl iodide plus a small amt of Hg with the light from a Hg vapor lamp, yield 75% (Ref 3). 

Palladium Paraformaldehyde Paraldehyde Pentaborane-9 Pentacarbonyliron Arsenic, carbon, ozonides, sulfur, sodium tetrahydridoborate Liquid oxygen Alkalies, HCN, iodides, nitric acid, oxidizers Dimethylsulfoxide Acetic acid, nitric oxide, transition metal halides, water, zinc... 

These iodometric calibration methods are based on the assumption that there is a stoichiometric reaction between ozone and the iodine in the various potassium iodide procedures. Three essentially independent methods have been used to test the accuracy of this assumption measuring the absorption of ultraviolet radiation at 254 nm by ozone in air, measuring the absorption of infrared radiation at 9,480 nm by ozone in air, and determining the ozone concentration in air by titration with nitric oxide. 

Nitrogen dioxide oxidizes an aqueous solution of iodide to iodine, hydrogen sulfide to sulfur, and carbon monoxide to carbon dioxide. In such reaction, it is reduced to nitric oxide, rather than nitrogen ... 

Holmes209 reported briefly on the results of a study of the reaction between nitric oxide and hydrogen iodide over the temperature range 363-573°K. This obviously complex reaction was represented by the overall reaction... 

The reaction was studied at nitric oxide and hydrogen iodide pressures of 40-500 and 120-750 torr, respectively. The reaction rate was determined by analyzing for NO and I2 at various times and, in some cases, for ammonium iodide and hydrogen iodide. In clean Pyrex vessels results were not reproducible, but in vessels seasoned with a carbonaceous deposit reproducibility was satisfactory and the reaction was observed to be homogeneous. The rate law was determined to be second order... 

Later, Holmes and Sundaram210 studied the gas phase photolysis of hydrogen iodide in the presence of nitric oxide. NO was found to inhibit the reaction by reducing the quantum yields of hydrogen and iodine to an equal extent. The mechanism proposed was... 

The cobalt analog of the iron dinitrosyl iodide is prepared according to the above procedure with only minor modifications, which are outlined below. Anhydrous deoxygenated reagent-grade acetone and 35.4 g. of cobalt powderf are added to the 1000-ml. flask and allowed to react with the ether solution of iodine (38.1 g. (0.15 mole) of iodine in 300 ml. of ether) over a period of 30 minutes. Then nitric oxide is admitted to the flask. The reaction... 

E. Peligot said that after being melted, the peroxide requires a much lower temp, for its solidification, for at —16° the compound remains liquid, and J. Fritzsche said that it can be re-solidified only at —30° because a little nitric acid has been formed, and this also accounts for the turbidity of the cooling liquid. For the fusion curve with nitric oxide, vide supra, nitrogen trioxide. P. Pascal studied the f.p. of binary systems of nitrogen peroxide with bromoform, chloroform, carbon tetrachloride, bromobenzene, methyl iodide, chloropicrin, and camphor. 

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