Tetrahydroxozincate
Ion / From Wikipedia, the free encyclopedia
In chemistry, tetrahydroxozincate or tetrahydroxidozincate[1] is a divalent anion (negative ion) with formula Zn(OH)2−
4, with a central zinc atom in the +2 or (II) valence state coordinated to four hydroxide groups. It has Sp3 hybridization. It is the most common of the zincate anions, and is often called just zincate.
Identifiers | |
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3D model (JSmol) |
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PubChem CID |
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Properties | |
H4O4Zn−2 | |
Molar mass | 133.41 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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These names are also used for the salts containing that anion, such as sodium zincate Na2Zn(OH)4 [2] and calcium zincate CaZn(OH)4·2H2O [3]
Zincate salts can be obtained by reaction of zinc oxide (ZnO) or zinc hydroxide (Zn(OH)
2) and a strong base like sodium hydroxide.
It is now generally accepted that the resulting solutions contain the tetrahydroxozincate ion.[4] Earlier Raman studies had been interpreted as indicating the existence of linear ZnO2−
2 ions.[5]