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A sulfonyl group is an organic radical
Radical (chemistry)

In chemistry, radicals are atoms, molecules or ions with unpaired electrons on an otherwise open shell configuration. These unpaired electrons are usually highly chemical reaction, so radicals are likely to take part in chemical reactions....
 or functional group
Functional group

In organic chemistry, functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules....
 obtained from a sulfonic acid
Sulfonic acid

Sulfonic acid usually refers to a member of the class of organic acids with the general formula R-S2-OH, where R is usually a hydrocarbon side chain....
 by the removal of the hydroxyl
Hydroxyl

Hydroxyl in chemistry stands for a molecule consisting of an oxygen atom and a hydrogen atom connected by a covalent bond. The neutral form is a hydroxyl Radical and the hydroxyl anion is called a hydroxide....
 group. Sulfonyl groups can be written as having the general formula R-S(=O)2-R', where there are two double bonds between the sulfur
Sulfur

Sulfur or sulphur is the chemical element that has the atomic number 16. It is denoted with the symbol S. It is an abundant Valence non-metal....
 and oxygen
Oxygen

Oxygen no O2 produced; 2) O2 produced, but absorbed in oceans & seabed rock; 3) O2 starts to gas out of the oceans, but is absorbed by land surfaces and formation of ozone layer; 4-5) O2 sinks filled and the gas accumulates]]...
. The names of sulfonyl groups typically end in -syl, such as in tosyl
Tosyl

A tosyl group is CH3C6H4SO2. This group is usually derived from the compound 4-Toluenesulfonyl chloride, CH3C6H4SO2Cl, which forms esters and amides of toluenesulfonic acid....
 chloride which is p-toluenesulfonyl chloride, CH3C6H4SO2Cl or mesyl
Mesylate

In chemistry, a mesylate is any salt or ester of methanesulfonic acid . In salts, the mesylate is present as the CH3SO3- anion....
 chloride which is methylsulfonyl chloride, CH3SO2Cl.






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Sulfone
A sulfonyl group is an organic radical
Radical (chemistry)

In chemistry, radicals are atoms, molecules or ions with unpaired electrons on an otherwise open shell configuration. These unpaired electrons are usually highly chemical reaction, so radicals are likely to take part in chemical reactions....
 or functional group
Functional group

In organic chemistry, functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules....
 obtained from a sulfonic acid
Sulfonic acid

Sulfonic acid usually refers to a member of the class of organic acids with the general formula R-S2-OH, where R is usually a hydrocarbon side chain....
 by the removal of the hydroxyl
Hydroxyl

Hydroxyl in chemistry stands for a molecule consisting of an oxygen atom and a hydrogen atom connected by a covalent bond. The neutral form is a hydroxyl Radical and the hydroxyl anion is called a hydroxide....
 group. Sulfonyl groups can be written as having the general formula R-S(=O)2-R', where there are two double bonds between the sulfur
Sulfur

Sulfur or sulphur is the chemical element that has the atomic number 16. It is denoted with the symbol S. It is an abundant Valence non-metal....
 and oxygen
Oxygen

Oxygen no O2 produced; 2) O2 produced, but absorbed in oceans & seabed rock; 3) O2 starts to gas out of the oceans, but is absorbed by land surfaces and formation of ozone layer; 4-5) O2 sinks filled and the gas accumulates]]...
. The names of sulfonyl groups typically end in -syl, such as in tosyl
Tosyl

A tosyl group is CH3C6H4SO2. This group is usually derived from the compound 4-Toluenesulfonyl chloride, CH3C6H4SO2Cl, which forms esters and amides of toluenesulfonic acid....
 chloride which is p-toluenesulfonyl chloride, CH3C6H4SO2Cl or mesyl
Mesylate

In chemistry, a mesylate is any salt or ester of methanesulfonic acid . In salts, the mesylate is present as the CH3SO3- anion....
 chloride which is methylsulfonyl chloride, CH3SO2Cl. Sulfonyl groups can be reduced to the hydrocarbon
Hydrocarbon

In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. With relation to chemical terminology, aromatic hydrocarbons or arenes, alkanes, alkenes and alkyne-based compounds composed entirely of carbon or hydrogen are referred to as "pure" hydrocarbons, whereas other hydrocarbons with bonded com...
 with lithium aluminium hydride
Lithium aluminium hydride

Lithium aluminium hydride , commonly abbreviated to LAH, is a reducing agent used in organic synthesis. It is more powerful than the related reagent sodium borohydride due to the weaker Al-H bond compared to the B-H bond....
 (LiAlH4).

See also

  • Sulfonyl halide
    Sulfonyl halide

    Sulfonyl halide groups occur when a sulfonyl functional group is Single bond to a halogen atom. They have the general formula R-SO2-X where X is a halogen....