Illustrated Glossary of Organic Chemistry

Sulfone: A functional group characterized by a sulfur atom doubly-bonded to two oxygen atoms, and flanked by two carbon atoms of any hybridization.

General sulfone molecular structure.
R = any carbon group.
Tert-butyl methyl sulfone   
Cyclooctenyl phenyl sulfone   
Dapsone, an antibiotic for treatment
of certain bacterial infections.