Nickel(III) oxide
| Nickel(III) oxide | |
|---|---|
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Nickel (III) oxide |
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Other names
Nickel sesquioxide, |
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| Identifiers | |
| CAS number | 1314-06-3  |
| PubChem | 10313272 |
| EC number | 215-217-8 |
| RTECS number | QR8420000 |
| Properties | |
| Molecular formula | Ni2O3 |
| Molar mass | 165.39 g/mol |
| Appearance | black-dark gray solid |
| Density | 4.84 g/cm3 |
| Melting point |
600 °C (decomposes) |
| Solubility in water | negligible |
| Hazards | |
| NFPA 704 |
 0
2
0
|
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Nickel(III) oxide (Ni2O3) has been referred to in the literature, but is not a well characterised compound.[1] The substance black nickel oxide is sometimes described as being Ni2O3; however, the composition quoted by suppliers has a nickel content of around 77% by weight, whereas Ni2O3 would have 70.98% Ni by weight, and may be non-stoichiometric NiO.[1]
There are references in the literature to traces of Ni2O3 on nickel surfaces, and as intermediates in nickel oxidation, e.g.[2][3]
Nickel oxide hydroxide [edit]
The related nickel oxide hydroxide (NiOOH) can be prepared by reaction of nickel(II) chloride with sodium hypochlorite; the sodium hypochlorite functions as an oxidizing agent:
4OH- + 2NiCl2 + NaClO ---> Na+ + H2O + 2NiOOH + 5Cl-
In one modification[4] the compound is used in a catalytic amount with bleach in stoichometric amount in the oxidation of benzyl alcohol to benzoic acid:
or in double oxidation of 3-butenoic acid to fumaric acid:
External links [edit]
References [edit]
- ^ a b Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth–Heinemann. ISBN 0080379419.
- ^ An oxide of tervalent nickel , P. S. Aggarwal, A. Goswami, J. Phys. Chem.; 1961; 65(11); 2105-2105, doi:10.1021/j100828a503
- ^ Chemical vapor deposition of nickel oxide films from Ni(C5H5)2/O2, Jin-Kyu Kang, Shi-Woo Rhee, Thin Solid Films, 391, 1, (2001),57-61, doi:10.1016/S0040-6090(01)00962-2
- ^ An Efficient and Practical System for the Catalytic Oxidation of Alcohols, Aldehydes, and ,-Unsaturated Carboxylic Acids Joseph M. Grill, James W. Ogle, and Stephen A. Miller J. Org. Chem.; 2006; 71(25) pp 9291 - 9296; (Article) doi:10.1021/jo0612574
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