Nitrites, hypo—

The earliest oxidations were effected with nitrous fumes and later with mercuric oxide and isoamyl nitrite.74 Lead tetraacetate in acetic acid is in many cases the reagent of choice, but the removal of by-products can present some difficulties.75 IV-Haloimides and amides in alcoholic solutions have been reported to yield essentially pure tetrazolium salts76 and have been found specially useful in the preparation of heteroaryl-substituted tetrazolium salt.77,78 The novel formazans 49 have been successfully oxidized to 50 using 7V-chloro succinimide (Eq. II).79 tert-Butyl hypo-... 

A correlation may be established between the concentration of oxidized lipids and the TEARS value, expressed as MDA equivalents, in uM units. Correction is due in some cases for the interference by dyes or other factors. For example, the presence of anthocyanins in red cabbage leaves or turbiditjf causes overestimation of lipid hydroperoxides in plant tissue by the TEARS method. TEARS was used to assert the level of endogenous peroxides in hypo- and hyperthyroidism, both conditions being characterized by low lipid and lipoprotein plasma levels and enhanced oxidative metabolism . In a procedure for determination of TEARS in edible oils, the sample is placed in a centrifuge at 12000 g before measuring at 532 nm (e = 1.56 x 10 M cm ) . A usual procedure for determination of TEARS in certain complex matrices involves steam distillation of the aldehydes responsible for the value, instead of extraction. In nitrite-cured meats, excess nitrite may cause nitrosation of MDA, thus interfering with distillation. To avoid this interference sulfanilamide is added, which is converted to a diazonium salt and... 

IK. 13 Zinc is a much more reactive metal than cadmium, as expected from the discussion on pages 877-879. Yet both are ised to protect iron from rusting. How is this possible 18.14 Sodium hypo phosphite. NaH.PQ . has been suggested as a repbeemem of sodium nitrite. NaNCK. as a meat preservative to prevent botulism Draw the structure of each anion. 

When heated with solid potassium nitrite, ammonium sulphate reacts very energetically, sufficient heat being generated to raise the temperature of the mass to incandescence.7 When heated in solution, the two substances decompose, all the nitrogen being evolved in the free state.8 Electrolytic oxidation of a dilute-acid solution of ammonium sulphate at a lead-peroxide anode produces hydroxylamine and hypo-nitrous acid, these substances decomposing with liberation of nitrogen and nitrous oxide 9... 

The name of the replacing metal is retained, e.g. potassium sulphate, sodium nitrite, calcium hypochlorite, potassium permanganate. Notice that the prefixes, hypo- and pc7 - are not changed. 

Nitrous acid, sodium nitrite, potassium nitrite hyponitrous acid and the hypo-nitrites hydrogen cyanide, potassium cyanide, cyanogen the cyanate ion, fulminate ion, azide ion, and thiocyanate ion. 

M. Akhtar, Some Recent Developments in the Photochemistry of Organic Nitrites and Hypo-halites, in Advan. Photochem., Vol. 2, Interscience, New York, 1964, p. 263. 

AMMONIUM HYPO SOLUTION (7783-18-8) Slowly deocmposes in water. Reacts violently with carbon dust, finely divided aluminum, magnesium, potassium. Incompatible with sulfuric acid, isocyanates, strong oxidizers, chlorates, nitrates, nitrites (forms ammonia), hydrogen sulfide, and sulfur trioxide gases,... 

Rate coefficients for thermal decomposition of di-t-butyl hypo-nitrite at 50° compared very well with those extrapolated from data in the literature, obtained by very different techniques, and reaction products contained one mole of base for each mole of PQ + consumed, strongly supporting the proposed electron transfer mechanism. It follows that, in 1 1 t-butyl alcohol-H20, t-butoxy radical must possess oxidizing power in excess of that of PQ2+, for which E0 = —446 mV (NHE), and may, therefore, function as a primary one-electron oxidant in reactions at present interpreted in other ways. 

I. Hydro-chlorate d ammoniaque. 2. Hypo-nitrite d ammoniaque hydrate. 3. Benzoate d ammoniaque hydrat6. 4. Oxalate d ammoniaque cristallis6 et dessech. ... 

Hydro-chlorate d hydrog6ne bi-carbone ( ther hydro-chlorique). 8. Hypo-nitrite d hydrog ne bicarbone hydrate (ether nitrique). 9. Benzoate d hyd. bi-carb. hydrate (ether benzoique). 10. Oxalate d hyd. bi-carb. hydrate ( ther oxalique). II. Bi-carbonate d hyd. bicarb, hydrate (sucre de Cannes). 12. Bi-carbonate d hydr. bi-carb. bi-hydrate (sucre de raisins). 13. Hydrate d hydr. bi-carb. bi-basique ( ther sulfurique). 14. Hydrate d hydr. bi-carb. (alcool). 

In order to avoid the large extrapolation to common temperature, required for comparison of the thermolysis of both -butyl perbenzoate and the corresponding hyponitrite, we decided to study the photolysis of the perester under the same conditions of solvent and temperature as convenient for the thermal hypo-nitrite reaction (27°, hexane) (r7). Product studies showed hexyl benzoate was formed from a chain Induced reaction. The direct photolysis gave phenyl t-butyl ether and high relative yields of carbon dioxide. Both... 

Figure 11 shows the fit obtained for the hypo-nitrite source (12) of the 2-butyl-t-butoxy pair using the same value of k as obtained in Figure 10. That... 

---