Sulfur-nitrogen compounds reactions

A considerable number of sulfur-nitrogen compounds exist, and some of them have unusual properties. The most common compound of this type is S4N4, tetrasulfur tetranitride. The compound can be prepared by the following reaction ... 

Sulfur-nitrogen chemistry is an area that has seen major developments over the last few decades, in part because of the conductivity of the polymer (SN). The following discussion is necessarily selective, and more detailed accounts are listed at the end of the chapter. Probably the best known of the sulfur-nitrogen compounds is tetrasulfur tetranitride, S4N4. It has traditionally been obtained using reaction 16.119, but a more convenient method is reaction 16.120. Tetrasulfur tetranitride is a diamagnetic orange solid (mp 451 K) which explodes when heated or struck pure samples are very sensitive (see exercise 1 at the end of the section). It is hydrolysed slowly by water (in which it is insoluble) and rapidly by warm alkali (equation 16.121). 

H. W. Roesky, H. H. Giere, Inorg. Nucl. Chem. Lett. 1971, 7, 171-175. Sulfur-nitrogen compounds. 33. Preparation of iV-(trifluoromethylsulfonyl)sulfamoyl fluoride and some reactions. 

S03 was studied " by pulsed accelerated flow. The reaction again involves Cl transfer and is shown in Scheme 2. The reactivity sequence for reactions involving Cl transfer to SO is NCl3>NHCl2>OCl >NH2C1. Finally, we note a paper on an NMR study of a range of sulfur-nitrogen compounds which is likely to be useful in mechanistic work in this area. 

A process development known as NOXSO (DuPont) (165,166) uses sodium to purify power plant combustion flue gas for removal of nitrogen oxide, NO, and sulfur, SO compounds. This technology reHes on sodium metal generated in situ via thermal reduction of sodium compound-coated media contained within a flue-gas purification device, and subsequent flue-gas component reactions with sodium. The process also includes downstream separation and regeneration of spent media for recoating and circulation back to the gas purification device. A full-scale commercial demonstration project was under constmction in 1995. 

Inorganic Reactions. Thermal decomposition of Hquid sulfamic acid begins at 209°C. At 260°C, sulfur dioxide, sulfur trioxide, nitrogen, water, and traces of other products, chiefly nitrogen compounds, result. 

Oxidative reactions frequently represent a convenient preparative route to synthetic intermediates and end products This chapter includes oxidations of alkanes and cycloalkanes, alkenes and cycloalkenes, dienes, aromatic fluorocarbons, alcohols, phenols, ethers, aldehydes and ketones, carboxylic acids, nitrogen compounds, and organophosphorus, -sulfur, -selenium, -iodine, and -boron compounds... 

Reactions of ionic or covalent azides with chalcogen halides or, in the case of sulfur, with the elemental chalcogen provide an alternative route to certain chalcogen-nitrogen compounds. Eor example, the reaction of sodium azide with cyclo-Sa in hexamethylphosphoric triamide is a more convenient synthesis of S7NH than the S2CI2 reaction (Section 6.2.1). Moreover, the azide route can be used for the preparation of 50% N-enriched S7NH. 

Reactions occurring in hydrotreatment units are mainly hydrodesulfurization and hydrodenitrogenation of sulfur and nitrogen compounds. In... 

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