Tetrahydroxozincate

Tetrahydroxozincate
Identifiers
3D model (JSmol)
  • InChI=1S/4H2O.Zn/h4*1H2;/q;;;;+2/p-4
    Key: JOJHIPUJGCMGJM-UHFFFAOYSA-J
  • [OH-].[OH-].[OH-].[OH-].[Zn+2]
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).

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.

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]

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