In chemistry, disulfate or pyrosulfate is the
anion
An ion () is an atom or molecule with a net electrical charge.
The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by conve ...
with the molecular formula . Disulfate is the IUPAC name.
It has a
dichromate-like structure and can be visualised as two corner-sharing SO
4 tetrahedra
In geometry, a tetrahedron (plural: tetrahedra or tetrahedrons), also known as a triangular pyramid, is a polyhedron composed of four triangular faces, six straight edges, and four vertex corners. The tetrahedron is the simplest of all the ...
, with a bridging oxygen atom.
[ ]
In this anion, sulfur has an
oxidation state
In chemistry, the oxidation state, or oxidation number, is the hypothetical charge of an atom if all of its bonds to different atoms were fully ionic. It describes the degree of oxidation (loss of electrons) of an atom in a chemical compound. ...
of +6. Disulfate is the
conjugate base
A conjugate acid, within the Brønsted–Lowry acid–base theory, is a chemical compound formed when an acid donates a proton () to a base—in other words, it is a base with a hydrogen ion added to it, as in the reverse reaction it loses a ...
of the hydrogen disulfate (hydrogen pyrosulfate) ion , which in turn is the conjugate base of
disulfuric acid (pyrosulfuric acid).
See also
*
Potassium pyrosulfate
*
Sodium pyrosulfate
*
Pyrophosphate
In chemistry, pyrophosphates are phosphorus oxyanions that contain two phosphorus atoms in a P–O–P linkage. A number of pyrophosphate salts exist, such as disodium pyrophosphate (Na2H2P2O7) and tetrasodium pyrophosphate (Na4P2O7), among o ...
*
Pyrocarbonate
References
{{reflist
Sulfur oxyanions