Copper peroxide
| Names | |
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| IUPAC name
Copper(II) peroxide
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| Identifiers | |
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| ChemSpider |
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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
Species claimed to be "copper peroxide" have been reported by the reaction of cold solutions of Schweizer's reagent—a source of copper(II)—and hydrogen peroxide. The former prepared from copper(II) hydroxide and dilute ammonia solution.[2] The Schweizer's reagent used must not contain excess ammonia.[2]
It may also form from the very slow reaction of finely divided cupric oxide with cold hydrogen peroxide.[3]
It has also been claimed that copper peroxide can be produced by the reaction of an ice-cold solution of hydrogen peroxide with a suspension of copper hydroxide.[citation needed]
Several molecular copper peroxide complexes have been reported, but these species always feature supporting organic ligands.[4]
References
- ^ Gutsev, G. L.; Rao, B. K.; Jena, P. (2000). "Systematic Study of Oxo, Peroxo, and Superoxo Isomers of 3d-Metal Dioxides and Their Anions". The Journal of Physical Chemistry A. 104 (51): 11961–11971. Bibcode:2000JPCA..10411961G. doi:10.1021/jp002252s.
- ^ a b The Collected Works of Sir Humphry Davy: Discourses delivered before the Royal society. Elements of agricultural chemistry, pt. I. The Chemical Society (Great Britain). 1894. p. 32.
- ^ Krüss, Gerhard (1884). "Einige Beobachtungen über die höheren Sauerstoffverbindungen des Kupfers" (abstract). Ber. 17 (2): 2593–2597. doi:10.1002/cber.188401702186.
- ^ Elwell, Courtney E.; Gagnon, Nicole L.; Neisen, Benjamin D.; Dhar, Debanjan; Spaeth, Andrew D.; Yee, Gereon M.; Tolman, William B. (2017). "Copper–Oxygen Complexes Revisited: Structures, Spectroscopy, and Reactivity". Chemical Reviews. 117 (3): 2059–2107. doi:10.1021/acs.chemrev.6b00636. PMC 5963733. PMID 28103018.