Sulphur nitride

Nitrogen Sulphide or Sulphur Nitride, N4S4.—Preparation.— Nitrogen sulphide may be prepared by the action of dry ammonia on sulphur dichloride dissolved in either carbon disulphide 3 or benzene 4... 

Under similar conditions the cyanides of potassium, magnesium and aluminium form the corresponding thiocyanates. There are indications 4 that the sulphur nitride reacts with ammonium sulphide in the solution to give sulphur, which then interacts with the cyanide ... 

For sulphur nitride, see nitrogen sulphide for selenium, nitride, see nitrogen selenide and for tellurium nitride, see nitrogen telluride. J. von Liebig 26 obtained a brown powder by igniting chromium chloride in ammonia, and he thought the product was elemental chromium. A. Schrotter showed that the product is chromium nitride, Cr2N2 or CrN. 

The solid-state reaction between sulphur and ammonium chloride in the presence of thiourea, as a catalyst, has been shown to yield a new sulphur nitride polymer with the composition SioNgCla- The postulated mechanism of reaction is as follows ... 

Sulphur-Nitrogen-Phosphonis Compounds.—Thermolysis of compounds of the t3rpe RgPCl N—SOgX (R = Cl, Me, or Ph X = F or Cl) has been shown 2 to result in the formation of the compounds R2P(0)C1 and [NS(0)X] . Pyrolysis of phosphorus-sulphur-nitride halides with longer chains yields, amongst others, the cyclic compounds (37) and (38). The... 

Alternate manbers of series (c) may be regarded as ionised dimers of series (a), but they are different compounds and can be distinguished from the latter by their melting points and other characteristics. The simplest member of series (b) with n = 1, is formed together with more highly polymeric material, in a reaction between phosphorus trichloride and sulphur nitride. 

The highly coloured phosphadithiatriazenes are believed to be 8-electron six-membered ring systems which can be compared with the electron systems in sulphur nitride rings and cyclophosphazenes. 

Figure 4.9 Electrochemical route to poly(sulphur nitride).

Possibly the most important single advance in the field of synthetic inorganic polymers in recent years has been the discovery, in 1973, that polymeric sulphur nitride (SN)n (Polythiazyl) is a metallic-type conductor, which at low temperatures becomes superconducting. Polythiazyl is the first known example of such a polymeric superconductor, which does not contain metal atoms. A history of (SN)r research to 1973, and a review of the chemical properties and preparative... 

Introduction.—In this Part, compounds containing the S=N group (which does not always imply that they have typical double-bond character) have been described. The growing interest in the chemistry of these compounds has been shown by several review articles for example, sulphur nitrides (SN) have been extensively... 

Poly(sulphur nitride) is obtained as gold-coloured fibrous crystals from the solid-state polymerization of SN crystals. At room temperature its conductivity is in the region of 10 S m and this can be increased an order of magnitude by chemical modification with bromine. 

Thiadiazoles. The action of sulphur nitride, S4N4, on phenylacetylene gives a mixture of phenyl-1,2,5-thiadiazole (688 R = H), its amino-derivative (688 R = NH2), and a thiadiazolo-dithiatriazapentalene, possibly (689) the reaction of sulphur nitride with anisole and the three dimethoxybenzenes is equally complex, yielding in each case the benzo-bis- and -tris-thiadiazoles (690) and (691). °°... 

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