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Sulfur trioxide (alternative spelling sulphur trioxide) is the chemical compound with the formula SO 3. It has been described as "unquestionably the most [economically] important sulfur oxide". [ 1 ] It is prepared on an industrial scale as a precursor to sulfuric acid .
Oleum (Latin oleum, meaning oil), or fuming sulfuric acid, is a term referring to solutions of various compositions of sulfur trioxide in sulfuric acid, or sometimes more specifically to disulfuric acid (also known as pyrosulfuric acid). [1] Oleums can be described by the formula ySO 3 ·H 2 O where y is the
Sulfur trioxide, SO 3, a chemical compound of sulfur and the anhydride of sulfuric acid; Sulfite, SO 2− 3, a chemical ion composed of sulfur and oxygen with a 2− charge; SO(3), the special orthogonal group in 3 dimensions; the rotations that can be given an object in 3-space; Star Ocean: Till the End of Time, the third main game in the Star ...
The two principal sulfur oxides are obtained by burning sulfur: S + O 2 → SO 2 (sulfur dioxide) 2 SO 2 + O 2 → 2 SO 3 (sulfur trioxide). Many other sulfur oxides are observed including the sulfur-rich oxides include sulfur monoxide, disulfur monoxide, disulfur dioxides, and higher oxides containing peroxo groups.
Sulfur trioxide is the active ingredient in many sulfonation reactions. Typical conditions involve heating the aromatic compound with sulfuric acid: [2] C 6 H 6 + H 2 SO 4 → C 6 H 5 SO 3 H + H 2 O. Sulfur trioxide or its protonated derivative is the actual electrophile in this electrophilic aromatic substitution.
Sulfur trioxide pyridine complex is the compound with the formula C 5 H 5 NSO 3. It is a colourless solid that dissolves in polar organic solvents. It is the adduct formed from the Lewis base pyridine and the Lewis acid sulfur trioxide. The compound is mainly used as a source of sulfur trioxide, for example in the synthesis of sulfate esters ...
(Reuters) - A bridge connecting two states in Brazil's northern and northeastern regions collapsed on Sunday as vehicles were crossing, killing at least one person and spilling sulfuric acid into ...
The sulfur trioxide formed is added to sulfuric acid which gives rise to oleum (disulfuric acid) The oleum is then added to water to form sulfuric acid which is very concentrated. Since this process is an exothermic reaction, the reaction temperature should be as low as possible.