Tin(II) hydroxide

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.

Tin(II) hydroxide
Names
IUPAC name
Tin(II) hydroxide
Other names
Stannous hydroxide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.542
EC Number
  • 234-710-9
  • InChI=1S/2H2O.Sn/h2*1H2;/q;;+2/p-2
    Key: FBGKGORFGWHADY-UHFFFAOYSA-L
  • [OH-].[OH-].[Sn+2]
Properties
Sn(OH)2
Molar mass 152.73 g/mol
Thermochemistry
155 J·mol−1·K−1[1]
−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).
Infobox references

Preparation and structure

Crystals 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

Stannous hydroxide is easily oxidized to stannic oxide (SnO2) by air.

References
  1. Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A23. ISBN 978-0-618-94690-7.
  2. 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.
  3. 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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