Discuss the chemistry of the peroxo complexes of chromium(IV), (V), and (VI). (b) Discuss the electronic...

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Chemistry

Discuss the chemistry of the peroxo complexes of chromium(IV),(V), and (VI). (b) Discuss the electronic structure of Mn(III)compounds. (c) Discuss using suitable examples, the chemistry ofmanganese(IV) complexes.

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a)Chemistry of the Peroxo chromates:
peroxochromate is prepared by reacting hydrogen peroxide with metal chromate at low temperatures
2CrO₄^2- + 8H₂O₂ -----------> 2[Cr(O₂)₄]^2- + 8H₂O
[Cr(O₂)₄]^2- is called tetraperoxochromate with oxidation number +4 and is reduced by hydrogen peroxide,which results in forming tetraperoxochromate(V)
2[Cr(O₂)₄]^2- + H₂O₂ + 2OH^- -----------> Â Â 2[Cr(O₂)₄]^3- + 2H₂O + O₂
From this reaction [Cr(O₂)₄]⁴^- can also form which is unstable and has oxidaation number +6

b) Electronic structure of Mn(III) compunds:
Â Â electronic configuration of Mn⁺³ is [Ar]3d^{4

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c) Chemistry of Manganese (IV) complexes:
Â Â The +3 oxidation state compounds of Manganese complexes, are quite powerful oxidizing agents in aqueous solutions and also disproptionate forming manganese(II) and manganese(IV) complexes.
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