Nickel (IV) oxide

Crystal structure
	__ Ni 4+ __ O 2−
General
Surname	Nickel (IV) oxide
other names	Nickel dioxide
Ratio formula	NiO 2
Brief description	oxidising solid
External identifiers / databases
EC number	234-823-3
ECHA InfoCard	100,031,645
Wikidata	Q1985597
properties
Molar mass	90.69 g mol −1
Physical state	firmly
Melting point	Decomposes on heating
solubility	practically insoluble in water
safety instructions
H and P phrases	H: 350i-372-317-413
	P: 201-280-308 + 313
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Nickel (IV) oxide is a chemical compound from the group of metal oxides and nickel compounds .

Extraction and presentation

Nickel (IV) oxide (NiO ₂ · nH ₂ O) can be prepared by oxidation of nickel (II) hydroxide with persulfates are dissolved in water produced.

properties

Nickel (IV) oxide crystallizes in a distorted cadmium iodide layer structure ( space group C 2 / m (space group no. 12) , lattice parameters a = 4.875 Å , b = 2.814 Å, c = 5.582 Å, β = 125.8 °) . Template: room group / 12

Nickel (IV) oxide and its hydrates are chemically unstable (decomposes when heated and in contact with water) and are a powerful oxidizing agent . It does not burn itself, but it increases the risk of fire if it comes into contact with flammable substances and can significantly promote an existing fire.

use

Nickel (IV) oxide is used as an oxidizing agent for the conversion of alcohols into acids and the aliphatic hydrazones into the corresponding diazoalkanes .

safety instructions

Like many nickel compounds, nickel (IV) oxide is classified as carcinogenic.

Individual evidence

↑ ^a ^b ^c ^d ^e Entry on nickel (IV) oxide in the GESTIS substance database of the IFA , accessed on February 19, 2017(JavaScript required) .
↑ Entry on nickel dioxide in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
↑ Data sheet Nickel peroxide, technical, oxidizing agent, ~ 30% active peroxide basis from Sigma-Aldrich , accessed on April 16, 2011 ( PDF ).
↑ JM Tarascon, G. Vaughan, Y. Chabre, L. Seguin, M. Anne, P. Strobel, G. Amatucci: In Situ Structural and Electrochemical Study of Ni _{1 − x} Co _x O ₂ Metastable Oxides Prepared by Soft Chemistry. In: Journal of Solid State Chemistry . 1999, 147, 1, pp. 410-420, doi : 10.1006 / jssc.1999.8465 .
↑ Erwin Riedel, Inorganic Chemistry
↑ Data sheet nickel (IV) oxide from Sigma-Aldrich , accessed on February 18, 2010 ( PDF ).

[GESTIS-1] Entry on nickel (IV) oxide in the GESTIS substance database of the IFA , accessed on February 19, 2017(JavaScript required) .

[CLP_100.031.645-2] Entry on nickel dioxide in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .

[Sigma-3] Data sheet Nickel peroxide, technical, oxidizing agent, ~ 30% active peroxide basis from Sigma-Aldrich , accessed on April 16, 2011 ( PDF ).

[4] JM Tarascon, G. Vaughan, Y. Chabre, L. Seguin, M. Anne, P. Strobel, G. Amatucci: In Situ Structural and Electrochemical Study of Ni _{1 − x} Co _x O ₂ Metastable Oxides Prepared by Soft Chemistry. In: Journal of Solid State Chemistry . 1999, 147, 1, pp. 410-420, doi : 10.1006 / jssc.1999.8465 .

[5] Erwin Riedel, Inorganic Chemistry

[6] Data sheet nickel (IV) oxide from Sigma-Aldrich , accessed on February 18, 2010 ( PDF ).