Thiosulfurous acid

Thiosulfurous acid
Structure of thiosulfurous acid
Names
IUPAC names
sulfurothious S-acid[1]
sulfurothious O,S-acid[2]
Systematic IUPAC name
hydroxidooxidosulfanidosulfur[1]
Other names
sulfurothionous acid
Thiothionyl hydroxide (minor tautomer)
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
184467
  • InChI=1S/H2O2S2/c1-4(2)3/h(H2,1,2,3)
    Key: QAMMXRHDATVZSO-UHFFFAOYSA-N
  • OS(S)=O
Properties
H2S2O2
Molar mass 98.14668
Conjugate base Thiosulfite
Related compounds
Related compounds
 thiosulfuric acid
SSO
thiosulfinic acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Thiosulfurous acid is a hypothetical chemical compound with the formula HS−S(=O)−OH or HO−S(=S)−OH. Attempted synthesis leads to polymers.[3] It is a low oxidation state (+1) sulfur acid.[4] It is the Arrhenius acid for disulfur monoxide. Salts derived from thiosulfurous acid, which are also unknown, are named "thiosulfites", "thionosulfites" or "sulfurothioites". The ion is S=SO2−
2.

  1. ^ a b International Union of Pure and Applied Chemistry (2005). Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005). Cambridge (UK): RSC–IUPAC. ISBN 0-85404-438-8. p. 139. Electronic version.
  2. ^ ACD Chemsketch Name Free
  3. ^ Schmidt, Heinar; Ralf Steudel; Detlev Suelzle; Helmut Schwarz (1992). "Sulfur compounds. 148. Generation and characterization of dihydroxy disulfide, HOSSOH: the chainlike isomer of thiosulfurous acid". Inorganic Chemistry. 31 (6): 941–944. doi:10.1021/ic00032a004. ISSN 0020-1669.
  4. ^ +1 is the average oxidation state of the two structurally different sulfur atoms. The exterior atom has an oxidation number of −1 while the central sulfur atom has the oxidation state of +3.