Nickel(III) oxide

Nickel(III) oxide
IUPAC name Nickel (III) oxide
Other names Nickel sesquioxide, nickel trioxide
Identifiers
CAS number	1314-06-3 Y
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
Y oxide (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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

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. 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

• Reade Advanced Materials - Nickel oxide

References

1. ^ ^{a b} Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Oxford: 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