Tin(II) hydroxide
| Names | |
|---|---|
| IUPAC name
Tin(II) hydroxide
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| Other names
Stannous hydroxide
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| Identifiers | |
| ChemSpider | |
| ECHA InfoCard | 100.031.542 |
CompTox Dashboard (EPA)
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| Properties | |
| Sn(OH)2 | |
| Molar mass | 152.73 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Tin(II) hydroxide, Sn(OH)2, also known as stannous hydroxide is a chemical compound of tin in the +2 [oxidation state]. Pure Sn(OH)2 is prepared by reacting for example (CH3)3SnOH with SnCl2 in an aprotic solvent:[1]
- 2Me3SnOH + SnCl2 → Sn(OH)2 + 2Me3SnCl
There had been confusion as it had been believed that Sn(OH)2 was precipitated when a tin(II) salt is reacted with an alkali hydroxide such as NaOH, but this product was determined analytically to be hydrated tin(II) oxide, being either 5SnO.2H2O or 3SnO.H2O,[2] The structure of pure Sn(OH)2 is not known.[1]
Stannous hydroxide is easily oxidized to stannic acid (Sn(OH)4) by air since tin is often found in oxidation state +4. tin also has an oxidation state of 4+. the latin name for tin 4+ is stannic.
References
- ^ a b Holleman, Arnold Frederik; Wiberg, Egon (2001), Wiberg, Nils (ed.), Inorganic Chemistry, translated by Eagleson, Mary; Brewer, William, San Diego/Berlin: Academic Press/De Gruyter, ISBN 0-12-352651-5
- ^ Structure of Tin(II) "Hydroxide" and Lead(II) "Hydroxide", R. A. Howie & W. Moser, Nature 219, 372 - 373 (27 July 1968); doi:10.1038/219372a0
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