Percobaltate
Percobaltates are chemical compounds where the oxidation state of cobalt is +5. This is the highest established oxidation state of cobalt.[1] The simplest of these are bi-metallic Group 1 oxides such as sodium percobaltate (Na3CoO4); which may be produced by the reaction of cobalt(II,III) oxide and sodium oxide, using oxygen as the oxidant:
- 4 Co3O4 + 18 Na2O + 7 O2 → 12 Na3CoO4
The potassium salt can be synthesized similarly; its magnetic moment has indicated the existence of cobalt(V).[2][3] No crystallographic analysis has been reported for either material. Percobaltates can be stabilized by use of oxides or fluorides.[citation needed]
A number of organometallic Co(V) complexes have also been reported.[1]
See also
[edit | edit source]References
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