About: Sulfite ester

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A sulfite ester is a functional group with the structure (RO)(R'O)SO. They adopt a trigonal pyramidal molecular geometry due to the presence of lone pairs on the sulphur atom. When substituents R and R' differ, the compound is chiral owing to the stereogenic sulphur centre; when the R groups are the same the compound will have idealised Cs molecular symmetry. 2 ROH + SOCl2 → (RO)2SO + 2 HCl

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  • Un ester de sulfite est un composé organique comprenant un groupe fonctionnel (RO)(R'O)SO. Lorsque les substituants R et R' sont différents, le composé est chiral avec comme centre chiral l'atome de soufre. Les esters de sulfite sont couramment préparés par réaction entre le chlorure de thionyle et des alcools en présence d'une base telle que la pyridine : 2 ROH + SOCl2 + 2 C5H5N → (RO)2SO + 2 C5H5NH+Cl− On compte parmi les esters de sulfite des composés simples tels que le sulfite de diméthyle, le sulfite de diéthyle ou le , mais aussi le pesticide endosulfan.De nombreux esters de sulfites sont aussi préparés en utilisant des diols, par exemple des sucres. (fr)
  • A sulfite ester is a functional group with the structure (RO)(R'O)SO. They adopt a trigonal pyramidal molecular geometry due to the presence of lone pairs on the sulphur atom. When substituents R and R' differ, the compound is chiral owing to the stereogenic sulphur centre; when the R groups are the same the compound will have idealised Cs molecular symmetry. They are commonly prepared by the reaction of thionyl chloride with alcohols. The reaction is typically performed at room temperature to prevent the alcohol being converted into a chloroalkane. Bases such as pyridine can also be used to promote the reaction: 2 ROH + SOCl2 → (RO)2SO + 2 HCl The pesticide endosulfan is a sulfite ester. Some simple members include ethylene sulfite, dimethyl sulfite, and diphenylsulfite. Many examples have been prepared from diols, such as sugars. Sulfite esters can be powerful alkylation and hydroxyalkylation reagents. (en)
  • Органические сульфиты — сераорганические соединения, эфиры сернистой кислоты с общей формулой ROS(O)OR', где R, R' — углеводородные радикалы. (ru)
  • 亚硫酸酯是具有 (RO)(R'O)SO 结构的官能团。由于硫原子上存在孤对电子,亞硫酸酯的分子几何形状為三角锥狀。 当取代基 R 和 R' 不同时,由于立体硫中心,该化合物是具手性的;当兩個取代基相同时,化合物将具有理想化Cs分子对称性。 它们通常由亚硫酰氯与醇反应制备。 该反应通常在室温下进行,以防止醇转化为氯代烷。吡啶等碱也可用于促进此反应: 农药安殺番是一种亚硫酸酯。一些简单的成员包括亚硫酸乙烯酯、亚硫酸二甲酯和亚硫酸二乙酯。许多亞硫酸酯是由二醇,如糖制备而成的。亚硫酸酯可作為强大的烷基化和羟烷基化试剂。 (zh)
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  • Органические сульфиты — сераорганические соединения, эфиры сернистой кислоты с общей формулой ROS(O)OR', где R, R' — углеводородные радикалы. (ru)
  • 亚硫酸酯是具有 (RO)(R'O)SO 结构的官能团。由于硫原子上存在孤对电子,亞硫酸酯的分子几何形状為三角锥狀。 当取代基 R 和 R' 不同时,由于立体硫中心,该化合物是具手性的;当兩個取代基相同时,化合物将具有理想化Cs分子对称性。 它们通常由亚硫酰氯与醇反应制备。 该反应通常在室温下进行,以防止醇转化为氯代烷。吡啶等碱也可用于促进此反应: 农药安殺番是一种亚硫酸酯。一些简单的成员包括亚硫酸乙烯酯、亚硫酸二甲酯和亚硫酸二乙酯。许多亞硫酸酯是由二醇,如糖制备而成的。亚硫酸酯可作為强大的烷基化和羟烷基化试剂。 (zh)
  • Un ester de sulfite est un composé organique comprenant un groupe fonctionnel (RO)(R'O)SO. Lorsque les substituants R et R' sont différents, le composé est chiral avec comme centre chiral l'atome de soufre. Les esters de sulfite sont couramment préparés par réaction entre le chlorure de thionyle et des alcools en présence d'une base telle que la pyridine : 2 ROH + SOCl2 + 2 C5H5N → (RO)2SO + 2 C5H5NH+Cl− (fr)
  • A sulfite ester is a functional group with the structure (RO)(R'O)SO. They adopt a trigonal pyramidal molecular geometry due to the presence of lone pairs on the sulphur atom. When substituents R and R' differ, the compound is chiral owing to the stereogenic sulphur centre; when the R groups are the same the compound will have idealised Cs molecular symmetry. 2 ROH + SOCl2 → (RO)2SO + 2 HCl (en)
rdfs:label
  • Ester de sulfite (fr)
  • Sulfite ester (en)
  • Органические сульфиты (ru)
  • 亞硫酸酯 (zh)
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