Sulfonyl

A sulfone. It consists of a sulfonyl group bonded with two hydrocarbon substituents.

A sulfonyl group can refer either to a functional group found primarily in sulfones or to a substituent obtained from a sulfonic acid by the removal of the hydroxyl group similarly to acyl groups. Sulfonyl groups can be written as having the general formula R-S(=O)₂-R', where there are two double bonds between the sulfur and oxygen.

Sulfonyl groups can be reduced to the hydrocarbon with lithium aluminium hydride (LiAlH₄).

In inorganic chemistry, when the group -S(=O)₂- is not connected to any carbon atoms, it is referred to as sulfuryl.

Examples of sulfonyl group substituents

The names of sulfonyl groups typically end in -syl, such as:

Group name	Full name	Abbreviation	Example
Tosyl	p-toluenesulfonyl	Ts	Tosyl chloride (p-toluenesulfonyl chloride) CH₃C₆H₄SO₂Cl
Brosyl	p-bromobenzenesulfonyl	Bs
Nosyl	2- or 4-nitrobenzenesulfonyl	Ns
Mesyl	methanesulfonyl	Ms	Mesyl chloride (methanesulfonyl chloride) CH₃SO₂Cl.
Triflyl	trifluoromethanesulfonyl	Tf
Dansyl	5-(dimethylamino)naphthalene-1-sulfonyl	Ds	Dansyl chloride

Only carbon,
hydrogen
and oxygen

Hydrocarbons	Allene Alkene (Allyl, Vinyl) Alkyl (Methyl, Ethyl, Propyl, Butyl, Pentyl) Alkyne Benzyl Carbene Cumulene Methylene bridge Methylene group Methine Phenyl

Other	Acetoxy Acetyl Acryloyl Acyl Aldehyde Alkoxy (Methoxy) Benzoyl Carbonyl Carboxyl Dioxirane Epoxide Ester Ether Ethylenedioxy Hydroxy Ketone Methylenedioxy Peroxide (Organic)

Only one
element
apart from
C, H, O

Nitrogen	Amine Azo compound Cyanate Hydrazone Imide Imine Isocyanate Isonitrile Nitrene Nitrile Nitro compound Nitroso compound Organic amide Oxime

Phosphorus	Phosphonate Phosphonous

Sulfur	Disulfide Sulfone Sulfonic acid Sulfoxide Thial Thioester Thioether Thioketone Thiol

Selenium	Selenol Selenonic acid Seleninic acid Selenenic acid

Tellurium	Tellurol

Other

See also chemical classification, chemical nomenclature (inorganic, organic)

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