In
chemistry, tetrahydroxozincate or tetrahydroxidozincate
[ is a ]divalent
In chemistry, the valence (US spelling) or valency (British spelling) of an chemical element, element is the measure of its combining capacity with other atoms when it forms chemical compounds or molecules.
Description
The combining capacity, ...
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 ...
(negative ion
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 formula , with a central zinc
Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodi ...
atom in the +2 or (II) valence state coordinated to four hydroxide
Hydroxide is a diatomic anion with chemical formula OH−. It consists of an oxygen and hydrogen atom held together by a single covalent bond, and carries a negative electric charge. It is an important but usually minor constituent of water. I ...
groups. It has Sp3 hybridization. It is the most common of the zincate
In chemistry the term zincate may refer to several substances containing the element zinc:
* usually the anion ZnO22−, more properly called tetrahydroxozincate or salts thereof, such as sodium zincate .
* the polymeric anion n(OH)3−and its ...
anions, and is often called just zincate.
These names are also used for the salts containing that anion, such as sodium zincate Na2Zn(OH)4 [ and calcium zincate CaZn(OH)4·2H2O ][
Zincate salts can be obtained by reaction of ]zinc oxide
Zinc oxide is an inorganic compound with the formula . It is a white powder that is insoluble in water. ZnO is used as an additive in numerous materials and products including cosmetics, food supplements, rubbers, plastics, ceramics, glass, cement ...
(ZnO) or zinc hydroxide () and a strong base like sodium hydroxide.
It is now generally accepted that the resulting solutions contain the tetrahydroxozincate ion.[ Earlier Raman studies had been interpreted as indicating the existence of linear ions.][
]
Related anions and salts
The name "zincate" may also refer to a polymeric anion with formula approaching []''n'', which forms salts such as ·,[ or to mixed oxides of zinc and less electronegativity, electronegative elements, such as .][
]
See also
* tetrachlorozincate or tetrachloridozincate,
* tetranitratozincate,
References
[{{cite journal , doi = 10.1021/j100031a026 , title = EXAFS Investigations of Zn(II) in Concentrated Aqueous Hydroxide Solutions , year = 1995 , author1=Kaumudi I. Pandya , author2=Andrea E. Russell , author3=J. Mc Breen , author4=W. E. O' Grady , journal = The Journal of Physical Chemistry , volume = 99 , pages = 11967 , issue = 31]
IUPAC nomenclature of inorganic chemistry 2005
Nomenclature of Inorganic Chemistry, IUPAC Recommendations 2005 is the 2005 version of '' Nomenclature of Inorganic Chemistry'' (which is informally called the Red Book). It is a collection of rules for naming inorganic compounds, as recommended by ...