thioaldehyde S-oxides

https://doi.org/10.1351/goldbook.T06350
Compounds having the structure RC(=S=O)H. (Also known by the disapproved term sulfines which includes thioaldehyde S-oxides and thioketone S-oxides).
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1372 (https://doi.org/10.1351/pac199567081307)