Hyponitric acid

Nitrous acid, HNO2. See separate entry. Hyponitric acid, H2N2O3, trioxo di-nitrate(Il). Sodium salt from HjNOH in MeOH with CiHiNOi many complexes are known the free acid is unstable. 

Hydrazine azide Hydrazine chlorate Hydrazine dicarbonic acid diazide Hydrazine perchlorate Hydrazine selenate Hydrogen cyanide, unstabilized Hydroxyl amine iodide Hyponitrous acid... 

Thermal decomposition of nitramide, H2NNO2, or hyponitrous acid H2N2O2 (both of which have the empirical formula N2O.H2O) have also been used. The mechanisms of these and other reactions involving simple inorganic compounds of N have been reviewed. 

However, though N2O can be made in this way it is not to be regarded as the anhydride of hyponitrous acid since H2N2O2 is not formed when N2O is dissolved in H2O (a similar relation exists between CO and formic acid). 

Hyponitrous acid crystallizes from ether solutions as colourless crystals which readily decompose... 

H2N2O2 Hyponitrous acid Weak acid HON=NOH, isomeric with nitramide, H2N-N02 salts are known (p. 460)... 

H2N2O3 Hyponitric acid Known in solution and as salts, e.g. Angeli s salt Na2[0N=N02]... 

There is also considerable current environmental interest in hyponitrite oxidation because it is implicated in the oxidation of ammonia to nitrite, an important step in the nitrogen cycle (p. 410). Specifically, it seems likely that the oxidation proceeds from ammonia through hydroxylamine and hyponitrous acid to nitrite (or N2O). 

Nitrosyl-saure, /. nitrosylic acid (hyponitrous acid). -schwefelskure, /. nitrosylsulfuric acid. 

Untersalpetersaure, /. hyponitric acid (old name for nitrogen peroxide). 

The hyponitrites (16), esters of hyponitrous acid (HO N=N OH), are low temperature sources of alkoxy or acyloxy radicals. A detailed study of the effect of substituents on k4 for the hyponitrite esters has been reported by Quinga and Mendenhall,114... 

Dinitrogen monoxide, N,0, reacts with water to form hyponitrous acid, H,N202(aq), in a Lewis acid-base reaction. 

See Hyponitrous acid, also Sodium amide (reference 4)... 

Although they are oxides of nonmetals, CO and N20 do not give acidic solutions when added to water. However, they are formally the anhydrides of formic and hyponitrous acid, respectively. 

Hyponitrous acid, H2N202 is produced in the following reactions ... 

When a solution of Ag2N202 is treated with a solution of HC1 in ether, a solution containing hyponitrous acid H2N202 is obtained. 

Reduction of nitrates or nitrites by sodium amalgam in the presence of water has been used to prepare salts of hyponitrous acid. 

Both hyponitrous acid and nitroamide (also known as nitramide) have the formula H2N202. Draw the structures for these molecules and explain any difference in acid-base properties. 

Hydrazine salts have been prepared by the action of hypochlorites on ammonia1 or urea 2 by the hydrolysis of salts of sulfohydrazimethylene disulfonic acid 3 by the hydrolysis of triazoacetic acid 4 by the reduction of diazoacetic ester 5 by the reduction of nitroguanidine followed by hydrolysis 6 by the reduction of the nitroso derivatives of hexamethylene tetramine 7 by the reduction of nitrates or nitrites with zinc in neutral solution 8 by the action of sodium bisulfite on hyponitrous acid... 

The easiest way to 10 goes via the synthesis of KDNM (see Section n.C). Acidification of an aqueous solution of KDNM, which should be buffered with H3PO4 (pH = 6.5), followed by low-temperature extraction with diethyl ether, gives the monomeric emerald-green nitrosolic acid 10 dissolved in the ether phase. Slow removal of the solvent yields the yellowish dimeric form of 10. The acid (10) is only poorly characterized. It is known to slowly decompose into HCN and HNO2 in basic solution (decomposition of the anion DNM), while the free acid (10) rapidly decomposes to give fuhninic acid, HCNO and hyponitrous acid, HON=NOH. It should be noted that both the free acid and its metal DNM salts are highly explosive. 

Formula N2O MW 44.013 a diamagnetic molecule. Synonyms dinitrogen oxide nitrogen monoxide hyponitrous acid anhydride laughing gas. 

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