Tin(II) hydroxide, Sn(OH)2, also known as stannous hydroxide, is an inorganic compound tin(II). The only related material for which definitive information is available is the oxy hydroxide Sn6O4(OH)4, but other related materials are claimed. They are all white solids that are insoluble in water.
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| Names | |
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| IUPAC name
Tin(II) hydroxide
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| Other names
Stannous hydroxide
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.031.542 |
| EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| Sn(OH)2 | |
| Molar mass | 152.73 g/mol |
| Thermochemistry | |
Std molar
entropy (S⦵298) |
155 J·mol−1·K−1[1] |
Std enthalpy of
formation (ΔfH⦵298) |
−561 kJ·mol−1[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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Preparation and structure
editCrystals of Sn6O4(OH)4 has been characterized by X-ray diffraction. This cluster is obtained from solution of basic solutions of tin(II). The compound consists of an octahedron of Sn centers, each face of which is capped by an oxide or a hydroxide. The structure is reminiscent of the Mo6S8 subunit of the Chevrel phases..[2] The structure of pure Sn(OH)2 is not known.[3]
Sn(OH)2 has been claimed to arise from the reaction of (CH3)3SnOH with SnCl2 in an aprotic solvent:[3]
- 2 Me3SnOH + SnCl2 → Sn(OH)2 + 2 Me3SnCl
No crystallographic characterization is available on this material.
Reactions
editStannous hydroxide is easily oxidized to stannic oxide (SnO2) by air.
References
edit- ^ a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A23. ISBN 978-0-618-94690-7.
- ^ R. A. Howie; W. Moser (1968). "Structure of Tin(II) "Hydroxide" and Lead(II) "Hydroxide". Nature. 219 (5152): 372–373. Bibcode:1968Natur.219..372H. doi:10.1038/219372a0. S2CID 45007541.
- ^ 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
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