Nitrogen atoms, from decomposition

The reaction of Curtius, which is especially to be preferred in the case of the higher members on account of the favourable solubilities of the intermediate products, involves as its first stage the preparation of the hydrazide from an ester (or acid chloride). The hydrazide is then converted, usually very readily, by the action of nitrous acid into the azide. In many cases it is more convenient to prepare the azide by treating an acid chloride with sodium azide previously activated with hydrazine hydrate.1 Azides easily undergo thermal decomposition, the two azo nitrogen atoms being eliminated as elementary nitrogen. In this way, however, the same radicle is formed as was invoked above to explain the Hofmann reaction ... 

Vaporization proceeds from the head of wire bundle. However, the vaporization mechanism of the nitride, i.e., whether the vaporization takes place through the decomposition of the nitride into metal vapor and nitrogen atoms or not, is not clear. 

In this series of compounds, the chiral center is located at the nitrogen atom whereas most chiral catalysts used for asymmetric induction have a chiral center removed from the nitrogen atom and, moreover, contain a hydroxy group / to the nitrogen atom, which may lead to the decomposition... 

It must be pointed out that experiments intended to attach a nitro group to a nitrogen atom failed. The substance is stable, since it did not undergo decomposition after being maintained for 200 hr at 70°C, and its temperature of initiation is 187°C. Its explosive properties are as follows. At a density of 0.62 g/cm3 it detonates with a rate of 4030 m/sec, the lead block expansion is 325 cm3 and its relatively low sensitiveness to shock is indicated by the fact that it is exploded in a drop test by a 2-kg weight falling from a height of 60 cm. 

The kinetics of reaction of a number of A-nitrosothiols (334) in water with mercury(II) salts have been reported. Reaction is first order in both reactants and the products are nitrous acid and the corresponding thiol-Hg2+ complex. The mechanism involves slow attack by water at the nitrogen atom in the complex.300 The same group has also studied the copper(II)-catalysed decomposition of the, -nitrosothiols derived from penicillamine, cysteamine, thiomalic acid, A -acetylpenicillaminc, and cysteine.301... 

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