DiSulfur trioxide

It was suggested that the reaction of sulfur dioxide with sulfenes yields a cyclic intermediate, a 1,2,3-oxadithietane-2,3,3-trioxide that decomposes to a ketone with the loss of disulfur trioxide.An alternative scheme involves the loss of sulfur monoxide from an oxathiirane 1-oxide derived from the sulfene. The reaction of sulfur dioxide with diphenylsulfene may proceed through a 1,2,4-oxadithietane-2,2,4-trioxide.3,3-Bis(trifluoromethyl)-l,2,4-oxadithietane 2,2,4,4-tetraoxide 598 is obtained by thermolysis of 595. It decomposes to 599 on further heating, and it reacts in the presence of bis(trifluoromethyl) ketene to give a six-membered cyclic trisulfone and a thiirane sulfone. ... 

Disulfur trioxide must be stored below +15°C in a dry, oxygen-free atmosphere at pressures below 1 mm., but even under these conditions it is stable for only a few hours. 

Within the sulfur sub-group, there are two main types of oxides, the dioxides X 02 (X = S, Se, Te, Po) and the trioxides X Os (X = S, Se, Te). In addition, sulfur also forms disulfur monoxide, S2O. Transient XO species are known in the gaseous phase for S, Se, and Te. Polonium forms a black monoxide PoO. 

One of the few substances found to behave as an acid ui sulfuric acid is disulfuric (pyrosuifuric) acid, it is formed from sulfur trioxide and sulfuric acid ... 

Practice Problem 6.4 Write formulas for (a) disulfur decafluoride and (b) iodine trioxide. ... 

The increased stability of the product is reflected in the large amount of heat evolved in the reaction. A second sulfur trioxide molecule can eliminate its double bond by combining with a molecule of sulfuric acid to form a molecule of disulfuric acid ... 

Sulfur trioxide, sulfuric acid, fuming sulfuric acid (oleum), disulfuric acid (pyro-sulfuric acid). 

The species, SeJ and TeJ, appear to be square-planar like whose similarity is supported by theoretical calculations that treat all of them as 6-ir electron systems.The yellow selenium cation is obtained by treating elemental selenium with fluorosulfuric acid, fuming sulfuric acid, sulfur trioxide, disulfuric acid, or antimony pentafluoride. The red tellurium cation is obtained simi-larly. = ... 

Manufacture Thionyl chloride is manufactured by reacting sulfur dioxide or sulfur trioxide with sulfur dichloride and chlorine or with disulfur dichloride and chlorine ... 

ACETATO MERCURIOSO (Spanish) (21908-53-2) A strong oxidizer. Violent reaction with reducing agents, acetyl nitrate, diboron tetrafluoride, disulfur dichloride, combustible materials, fuels, hydrazine hydrate, hydrogen peroxide, hydrogen trisulfide, hypophospho-rous acid, methanethiol, phospham. sodium-potassium alloy, sulfur, sulfur trioxide. Incompatible with alcohols, alkali metals, ammonium nitrate, diboron tetrafluoride, hydrazinium nitrate, hydrogen sulfide, nitroalkanes, rubidium acetylide, selenium oxychloride. Forms heat-, friction-, or shock-sensitive explosives with anilinium perchlorate, chlorine, phosphorus,. sulfur, magnesium, potassium, sodium-potassium alloy. May increase the explosive or thermal sensitivity of nitromethane, nitroethane, 1-nitropropane and other lower nitroalkanes, silver azide, hydrazinium perchlorate. Slowly decomposes on exposure to air. 

YELLOW OXIDE of MERCURY (21908-53-2) A strong oxidizer. Violent reaction with reducing agents, acetyl nitrate, diboron tetrafluoride, disulfur dichloride, combustible materials, fuels, hydrazine hydrate, hydrogen peroxide, hydrogen trisulfide, hypophosphorous acid, methanethiol, phospham, sodium-potassium alloy, sulfur, sulfur trioxide. Incompatible with... 

When gaseous sulfur trioxide is dissolved in concentrated sulfuric acid, disulfuric acid forms ... 

The powerful oxidizing action of sulfur trioxide can be overcome by using the sulfur trioxide addition compounds mentioned above (page 612) their activity in sulfonation depends on their stability.167 Disulfur hexaoxide or its adducts to mineral acids (e.g., H2S207) are more powerful sulfonating agents than the stable adducts to dioxan55,101 or tertiary amines very mild conditions can be used with the latter 172 compounds that are especially sensitive to acids can be sulfonated by the pyridine-sulfur trioxide adduct without decomposition. 

Disulfur pentoxydichloride is readily prepared by chlorinating sulfur trioxide with carbon tetrachloride. Since... 

Disulfur pentoxydichloride has also been prepared by treating sulfur monochloride with sulfur trioxide vapor at low temperatures. ... 

The increase in acidity on the addition of SO3 to sulfuric acid is substantial, and an value of -14.5 is reached with 50 mol% SO3. The main component up to this SO3 concentration is pyrosulfuric (or disulfuric) acid H2S2O7. On heating or in the presence of water, it decomposes and behaves like a mixture of sulfuric acid and sulfur trioxide. In sulfuric acid, it ionizes as a stronger acid ... 

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