Compounds having the structure $\ce{RSH}$ ($\ce{R} \neq \ce{H}$), e.g. $\ce{MeCH2SH}$ ethanethiol. Also known by the term 'mercaptans' (abandoned by IUPAC).
Source: PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1372 [Terms] [Paper]
