Sulfanyl

Sulfanyl (HS•), also known as the mercapto radical, hydrosulfide radical, or hydridosulfur, is a simple radical molecule consisting of one hydrogen and one sulfur atom. The radical appears in metabolism in organisms as H2S is detoxified. Sulfanyl is one of the top three sulfur-containing gasses in gas giants such as Jupiter and is very likely to be found in brown dwarfs and cool stars. It was originally discovered by Margaret N. Lewis and John U. White at the University of California in 1939. They observed molecular absorption bands around 325 nm belonging to the system designated by 2Σ+ ← 2Πi. They generated the radical by means of a radio frequency discharge in hydrogen sulfide. HS• is formed during the degradation of hydrogen sulfide in the atmosphere of the Earth. This may be a deliberate action to destroy odours or a natural phenomenon.

For the chemistry of organo thiyl radicals, see Thiyl radical.
Sulfanyl

  Sulfur, S
  Hydrogen, H
Names
Systematic IUPAC name
Sulfanyl (substitutive)
Hydridosulfur(•) (additive)
Other names
λ1-Sulfane
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
299
  • InChI=1S/HS/h1H Y
    Key: PXQLVRUNWNTZOS-UHFFFAOYSA-N Y
  • [SH]
Properties
HS•
Molar mass 33.073 g mol−1
Appearance Yellow gas
Reacts
Thermochemistry
195.63 J K−1 mol−1
139.33 kJ mol−1
Related compounds
Related radicals
 Hydroxyl
Related compounds
 Hydrogen sulfide

Hydrogen disulfide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

The organic analogue of sulfanyl is thiyl radical with the formula RS•, where R is some organic group (e.g., alkyl or aryl).

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