Copper peroxide
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| IUPAC name
Copper(II) peroxide
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| Identifiers | |
3D model (JSmol)
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CompTox Dashboard (EPA)
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| Properties | |
| CuO2 | |
| Molar mass | 95.945 g/mol |
| Appearance | Dark olive-green solid |
| Related compounds | |
Related compounds
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Copper(IV) oxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Copper peroxide is a hypothetical inorganic compound with the chemical formula CuO2. The 1:2 ratio of copper and oxygen would be consistent with copper in its common +2 oxidation state and a peroxide group. Although samples of this composition have not been isolated, CuO2 has attracted interest from computational perspective. One highly cited analysis concludes that gaseous CuO2 is a superoxide, with copper in a +1 oxidation state: Cu+O−2.[1]
History
[edit | edit source]Species claimed to be "copper peroxide" have been claimed, e.g., by the reaction of cold solutions of Schweizer's reagent—a source of copper(II)—and hydrogen peroxide.[2] The Schweizer's reagent used must not contain excess ammonia.[2]
It was once claimed to result from the very slow reaction of finely divided cupric oxide with cold hydrogen peroxide.[3]
Several molecular copper peroxide complexes have been reported, but these species always feature supporting organic ligands.[4]
References
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