Nickel(III) oxide

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Nickel(III) oxide
Identifiers
CAS number 1314-06-3 YesY
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
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 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 stoichiometric amount in the oxidation of benzyl alcohol to benzoic acid:

Nickel oxide hydroxide oxidation of benzyl alcohol

or in double oxidation of 3-butenoic acid to fumaric acid:

Nickel oxide hydroxide oxidation of 3-butenoicid

References[edit]

  1. ^ a b Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0080379419. 
  2. ^ An oxide of tervalent nickel , P. S. Aggarwal, A. Goswami, J. Phys. Chem.; 1961; 65(11); 2105-2105, doi:10.1021/j100828a503
  3. ^ 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
  4. ^ 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