Stannite (ion)
The stannite ion is [Sn(OH)3]−, or similar. Stannite ion can be formed by adding strong base to stannous hydroxide. Stannite ion is a strong reducing agent; also, it may disproportionate to tin metal plus stannate ion.
There are stannite compounds, for example, sodium stannite, Na2SnO2.
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