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
- Caesium hexafluorocobaltate(IV)
References
- ^ a b Riedel, Sebastian; Kaupp, Martin (March 2009). "The highest oxidation states of the transition metal elements". Coordination Chemistry Reviews. 253 (5–6): 606–624. doi:10.1016/j.ccr.2008.07.014.
- ^ Brendel, Claus; Klemm, Wilhelm (January 1963). "Weitere Versuche zur Darstellung von Kaliumcobaltat (V)". Zeitschrift für anorganische und allgemeine Chemie (in German). 320 (1–4): 59–63. doi:10.1002/zaac.19633200109.
- ^ D. Nicholls (2 October 2013). The Chemistry of Iron, Cobalt and Nickel: Comprehensive Inorganic Chemistry. Elsevier Science. pp. 1107–. ISBN 978-1-4831-4643-0.
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- HCo(CO)4
- CoBr2
- Co(CN)2
- CoCO3
- CoC2O4
- CoCl2
- Co(ClO3)2
- Co(ClO4)2
- CoF2
- Co(HCO2)2
- CoI2
- Co(NO3)2
- Co3(PO4)2
- Co(OAc)2
- CoGeO3
- CoO
- Co(OH)2
- CoS
- Co(OCN)2
- Co(SCN)2
- CoSO4
- CoSe
- Co3P2
- CoH2
- Co(C3H6O3)2
- C
24H
48CoO
4 - C
36H
70CoO
4
- CoSi
- CoGe
- Co3O4
- CoAs
- CoCl3
- Co(NO3)3
- Co2O3
- CoF3
- Co(OH)3
- LiCoO2
- NaxCoO2
- CoF4
- Cs2CoF6
- CoC28H44
- Na3CoO4
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