Arsonic acid

Arsonic acid is the simplest of the arsonic acids. It is a hypothetical compound, although the tautomeric arsenious acid (As(OH)3) is well established. In contrast to the instability of HAsO(OH)2, the phosphorus compound with analogous stoichiometry exists as the tetrahedral tautomer. Similarly, organic derivatives such as phenylarsonic acid are tetrahedral with pentavalent central atom.

Arsonic acid
Names
Preferred IUPAC name
Arsonic acid
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
PubChem CID
UNII
  • InChI=1S/AsH2O3/c2-1(3)4/h(H2,2,3,4)
    Key: MJJNNUVOCYXPBG-UHFFFAOYSA-N
SMILES
  • O[AsH](=O)O
Properties
AsH3O3
Molar mass 125.943 g·mol−1
Conjugate base Hydrogen arsonate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
For the functional group, see Arsonic acid (functional group).

There are similar acids that are the same except for having different pnictogens. The phosphorus equivalent is phosphonic acid.

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