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Cobalt(II) chloride
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===Reduction=== [[File:Co(norbornyl)4.png|thumb|left|The structure of a cobalt(IV) [[coordination complex]] with the [[norbornyl]] anion]] Reaction of the anhydrous compound with [[sodium cyclopentadienide]] gives [[cobaltocene]] {{chem|Co|(|C|5|H|5|)|2}}. This 19-electron species is a good reducing agent, being readily oxidised to the yellow [[18-Electron rule|18-electron]] cobaltocenium cation {{chem|[|Co|(|C|5|H|5|)|2|]|+}}.
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