Sulphur sulphidic

Peracetic acid oxidation of 2,5-diphenyl-l,4-dithiadiene-l-oxide produces 2,5-diphenyl-l,4-dithiadiene-l, 1-dioxide in 72% yield without reaction with the sulphide sulphur atom40 (equation 13). This is rather surprising given the earlier evidence concerning relative rates37. 

Calcium chlorate reacts dangerously as do metal chlorates. This occurs with interactions of this compound with carbon, aluminium, metal sulphides, sulphur and phosphorus. 

Pour an ammonium sulphide solution into a potassium chromate or dichromate solution and heat the mixture. How does the solution s colour change What is the composition of the precipitate Write the equation of the reaction. What properties does chromium (VI) exhibit in this reaction How does an acidified potassium chromate or dichromate solution react with hydrogen sulphide, sulphur dioxide, and an iron(II) salt Write the equations of the reactions. 

Type 4A sieves. The pore size is about 4 Angstroms, so that, besides water, the ethane molecules (but not butane) can be adsorbed. Other molecules removed from mixtures include carbon dioxide, hydrogen sulphide, sulphur dioxide, ammonia, methanol, ethanol, ethylene, acetylene, propylene, n-propyl alcohol, ethylene oxide and (below -30°) nitrogen, oxygen and methane. The material is supplied as beads, pellets or powder. 

Fig. 8.15 The sodium sulphide-sulphur phase diagram. (By permission of N. Webber and J.T. Kummer. Proceedings of the 21st Annual Power Sources Conference. 1967.)...

Thus diffusion separation is effective in increasing low yield concentrations of product but as the equilibrium yield rises the efficiency of enrichment is reduced. One further drawback arises if the hydrogen sulphide/sulphur stream is recycled. Eventually, if the product sulphur is not also removed, the partial pressure of the sulphur will be so great as to depress the forward reaction even under upset equilibrium conditions. 

When nitric acid acts as an oxidizing agent, nitrogen monoxide (NO) is formed. From the cadmium sulphide, sulphur is formed (unless the acid is too concentrated and hot), and cadmium ions remain dissolved. Again water is probably formed. 

Reducing agents (e.g. hydrogen sulphide, sulphur dioxide, hydrogen peroxide, and hydr iodic acid) These convert cerium(IV) ions into cerium(III). 

Ferrous thio-orthophosphite, Fe3(PS3)2 is prepared 6 by heating a mixture of ferrous sulphide, sulphur, and red phosphorus. It crystallises in black, hexagonal laminae which are very stable, resisting markedly the action of acids and alkalies. 

Chilcott, R.P., Jenner, J., Carrick, W., Hotchkiss, S.A., Rice, P. (2000). Human skin absorption of bis-2-(chloroethyl)sulphide (sulphur mustard) in vitro. J. Appl. Toxicol. 20 349-55. 

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