A seleno-mercaptan is an organic compound of the formula R-SeH. As such, it is an analogue of
alcohols and thiols which contain oxygen and sulfur respectively in place of the seleniumatom.
Seleno-mercaptans are toxic, as are the similar mercaptans (
thiols), and notably foul-smelling, such that the Guinness Book of Recordslists butyl seleno-mercaptan, a natural chemical produced by skunks (C4H9SeH), as a candidate for the foulest-smelling chemical.
* [http://chemistry.about.com/od/chemistryfaqs/f/blsmell.htm What is the smelliest molecule? at chemistry.about.com]
* [http://guinnessworldrecords.com Guinness World Records]
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