sulfoxides

https://doi.org/10.1351/goldbook.S06124
Compounds having the structure R2S=O (RH), e.g. Ph2S=O diphenyl sulfoxide.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1370 [Terms] [Paper]