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Das cubane

From Wikipedia, the free encyclopedia
Das cubane
Names
Other names
tetrakis[μ-(acetato-κO:κO')]tetra-μ3-oxotetrakis(pyridine)tetracobalt
Identifiers
3D model (JSmol)
  • InChI=1S/4C5H5N.4C2H4O2.4Co.4O/c4*1-2-4-6-5-3-1;4*1-2(3)4;;;;;;;;/h4*1-5H;4*1H3,(H,3,4);;;;;;;;/q;;;;;;;;4*+1;;;;/p-4
    Key: JIRPTERIJDAISX-UHFFFAOYSA-J
  • [Co+]=O.[Co+]=O.[Co+]=O.[Co+]=O.n1ccccc1.n1ccccc1.n1ccccc1.n1ccccc1.CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].CC(=O)[O-]
Properties
C28H32Co4N4O12
Molar mass852.313 g·mol−1
Appearanceolive green solid
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa).
Chemical compound

TheDas cubane is atransition metal carboxylate complex with the formula [CoO(OAc)py]4 where OAc isacetate and py ispyridine. The compound is named after Birinchi K. Das, who led the team that discovered the cluster. The compound features of Co4O4 core. Each Co(III) center islow-spin and hasoctahedral geometry. The compound is prepared by mixing a cobalt(II) salt with acetate and pyridine followed by oxidation withhydrogen peroxide.[1] Cobalt(III) carboxylates have attracted interest as catalysts for the oxidation of xylene toterephthalic acid.[2]


References

[edit]
  1. ^Chakrabarty, Rajesh; Bora, Sanchay J.; Das, Birinchi K. (2007). "Synthesis, Structure, Spectral and Electrochemical Properties, and Catalytic Use of Cobalt(III)−Oxo Cubane Clusters".Inorganic Chemistry.46 (22):9450–9462.doi:10.1021/ic7011759.PMID 17910439.
  2. ^Beattie, James K.; Hambley, Trevor W.; Klepetko, John A.; Masters, Anthony F.; Turner, Peter (1997). "The Chemistry of Cobalt Acetate—III. The isolation and crystal structure characterisation of the mixed valence octacobalt oligomer, [Co8(O)4(CH3CO2)6(OMe)4]Cl4(OHn)4 · 6H2O (N = 1 or 2), derived from the preparation of cobalt(III) acetate".Polyhedron.16 (12):2109–2112.doi:10.1016/S0277-5387(96)00498-6.
Cobalt(I)
Cobalt(II)
Cobalt(0,III)
Cobalt(II,III)
Cobalt(III)
Cobalt(III,IV)
Cobalt(IV)
Cobalt(V)
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