Percobaltate

Percobaltate is a kind of compound where the oxidation state of cobalt is +5, the highest of it by now. Their general expression is M₃CoO₄. Impure sodium percobaltate can be produced by the reaction of cobalt(II,III) oxide and sodium oxide, the oxidant is dioxygen:

$\rm \ 4Co_3O_4 + 18Na_2O + 7O_2 \rightarrow 12Na_3CoO_4$

The potassium salt can be synthesized in this way as well, the magnetic moment of them have proved the existence of cobalt(V).^[1]

See also

• Caesium hexafluorocobaltate(IV)

References

1. ^ 张青莲. 《无机化学丛书》第九卷：锰分族、铁系、铂系. 北京: 科学出版社. pp. P333. ISBN 7-03-002238-6.