Sulfone, sulfoxide compound

Sulfone is a generic term for a compound in which a sulfuryl group is bonded to a hydrocarbon group. The general formula is R-SO2-R. The two hydrocarbyl groups are either the same or different. For example, dimethyl sulfone CH3.SO2.CH3, phenylethyl sulfone C6H5.SO2.C2H5, diethyl sulfone, diphenyl sulfone, sulfolane, bisphenol S, and the like. Sulfur in sulfone compounds is high-valent sulfur, a stable crystalline organic compound that does not produce R2S. The most important industrialists are sulfolane, bisphenol S and dimethyl sulfone. It is generally a colorless, odorless, stable solid. Low carbon number hydrocarbon derivatives are soluble in water and most organic solvents. Sulfone compounds are generally oxidized by thioethers, alkylated by sulfinates, conjugated by dioxins, and reacted with aromatics and thionyl chloride. Method preparation. Sulfone is widely used in industries such as medicine, plastics and basic organic synthesis. For example, phenylpropane sulfone and dapsone are drugs for treating leprosy; bisphenol A type polysulfone is a plastic with excellent properties; sulfolane is an excellent solvent. The latter can be used to purify industrial gases, such as removing gases such as carbon dioxide and hydrogen sulfide from gases; extracting and separating aromatic hydrocarbons from petroleum fractions; and can also be used as a solvent for acrylonitrile polymerization. Some have sedative and hypnotic effects, but have more side effects. Bisphenol S has a strong acidity due to its strong electron-withdrawing property. In addition, it also has heat resistance, oxidation resistance and light stability. The main use is as a fixative. In addition, it is also used as a raw material for leather tanning agents, dyes, crosslinkers and engineering plastics (heat resistant). It can also be used as a substitute for bisphenol A and used as a raw material for polycarbonate, epoxy resin, polyester, phenolic resin and the like. Sulfoxide is a generic term for a compound in which a sulfinyl group is bonded to a hydrocarbon group R. Such as dimethyl sulfoxide, diethyl sulfoxide, benzyl sulfoxide and the like. The oxygen atom in the sulfoxide is in an anion state and is not subject to two groups and has a strong polarity. Strong oxidizing. Sulfoxide compounds may be optically active. It is solid at low temperature and is generally soluble in water, ethanol and ether. It can be reduced to thioether by a reducing agent, oxidized to a sulfone by an oxidizing agent, and can also form a salt with nitric acid. It can be obtained by oxidation of thioether or by reaction of aromatic hydrocarbon with thionyl chloride by Friedel-Crafts. There are many important reactions of sulfoxides, mainly in the following three types: 1 The α-position anion of sulfinyl group is highly reactive, easily reacts with halogenated alkyl compounds, carbonyl compounds and olefins; 2 and anhydride reaction can cause Pummerer to transpose The sulfoxide containing hydrogen at the 3β position can be decomposed by heating to form an olefin and a sulfinic acid.