Stannous hydroxide

Stannous hydroxide

Chembox new
ImageFile =
ImageName =
OtherNames = Tin (II) hydroxide
Section1 = Chembox Identifiers
CASNo = 12026-24-3
Section2 = Chembox Properties
Formula = Sn(OH)2
MolarMass = 152.73 g/mol
Density =
Solvent = other solvents
SolubleOther =
MeltingPt =
BoilingPt =

Stannous hydroxide, Sn(OH)2, 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:Egon Wiberg, Arnold Frederick Holleman (2001) "Inorganic Chemistry", Elsevier ISBN 0123526515] :2Me3SnOH + SnCl2 → Sn(OH)2 + 2Me3SnClThere 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, [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] The structure of pure Sn(OH)2 is not known.

Stannous hydroxide is easily oxidized to stannic acid, Sn(OH)4,since tin is often found in oxidation state +4.

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