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sulfone

alt. (context American spelling chemistry English) any of a class or organic compounds that have a sulfonyl functional group attached to two carbon atoms; drugs of this structure have been used to treat leprosy n. (context American spelling chemistry English) any of a class or organic compounds that have a sulfonyl functional group attached to two carbon atoms; drugs of this structure have been used to treat leprosy

Wikipedia
Sulfone

A sulfone is a chemical compound containing a sulfonyl functional group attached to two carbon atoms. The central hexavalent sulfur atom is double bonded to each of two oxygen atoms and has a single bond to each of two carbon atoms, usually in two separate hydrocarbon substituents.