Tin(II) hydroxide

Zinndihydroxid

White amorphous powder

Fixed

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Tin ( II) hydroxide ( Zinndihydroxid ) is a stable inorganic compounds of tin in the oxidation state II, the hydroxide is amphoteric, as it reacts with both strong acids and with strong bases. With strong acids, the hydroxide forms the tin ( II ) salts with strong bases and the stannate (II ), called Stannite outdated. The latter are thus salts of a tin (II) acid, both tri- [Sn (OH ) 3] - forms compounds - as well as tetra- hydroxozinn (II), - [ Sn ( OH) 4] 2.

Extraction, Preparation and Properties

Is On addition of dilute alkali metal hydroxide to tin (II ) salt solutions, a white precipitate of tin ( II) oxide hydrate formed, which is hardly soluble in water. The equation for the formation of the pure hydrate is as follows:

When loosening of tin (II ) salts in neutral water are produced by hydrolysis of tin ( II) hydroxides with non-uniform composition. For the hydrated oxides of different compositions are given, their formulas but all are controversial. Here are some examples from the literature:

  • 2SnO · H2O
  • 3SnO · H2O
  • 3SnO · 2H2O
  • 5SnO · 2H2O

The pure tin ( II) hydroxide was only 1976 are produced via an organotin 2R3SnOH by hydrolysis in the presence of tin ( II) chloride.

Is tin ( II) hydroxide is heated in an oxygen- free atmosphere, as a blue black powder, the tin (II ) oxide forms. Subsequently, the reaction equation:

All as tin ( II) compounds is the hydroxide and a reducing agent is easily oxidized to a tin ( IV) compound.

In strong bases, the hydrated oxide dissolves to the Alkalistannaten (II). The reaction formula for the reaction with sodium hydroxide to sodium stannate (II) is as follows:

CAS registry number Amphoterism Base (chemistry) Tin(II) oxide CRC Handbook of Chemistry and Physics Inorganic Chemistry (journal) Digital Object Identifier
837086
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