Platinum (II) oxide

Crystal structure
	__ Pt 2+ __ O 2−
General
Surname	Platinum (II) oxide
other names	Platinum monoxide
Ratio formula	PtO
Brief description	black to purple solid
External identifiers / databases
EC number	234-831-7
ECHA InfoCard	100,031,652
PubChem	82844
Wikidata	Q1676613
properties
Molar mass	211.08 g mol −1
Physical state	firmly
density	14.9 g cm −3
Melting point	Decomposition from 950 ° C.; Decomposition from 550 ° C
solubility	almost insoluble in water and ethanol ; soluble in aqua regia ;
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	no GHS pictograms
H and P phrases	H: 413
	P: ?
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Platinum (II) oxide (also platinum monoxide ) is one of several oxides of the chemical element platinum . There are also platinum (IV) oxide and platinum (VI) oxide .

Extraction and presentation

Platinum (II) oxide can be obtained by heating platinum to 430 ° C in an oxygen atmosphere with increased O ₂ pressure. Platinum (IV) oxide decomposes from 400 ° C to platinum (II) oxide and oxygen.

It can also be obtained by carefully heating platinum (II) hydroxide while splitting off water:

{\ displaystyle \ mathrm {Pt (OH) _ {2} \ longrightarrow PtO + H_ {2} O}}

properties

Like palladium (II) oxide, platinum (II) oxide does not crystallize in a sodium chloride structure , but in a platinum sulfide structure. In this there are edge-linked squares of a PtO ₄ structure. In addition, the platinum and oxygen atoms are arranged in ribbons.

With the exception of aqua regia , platinum (II) oxide is insoluble in acids . As a strong oxidizing agent , it is also reduced to the element by weak reducing agents such as hydrogen at room temperature.

The platinum monoxide hydrate formed by the reaction of platinum (II) solutions with sodium hydroxide solution cannot be dehydrated to platinum (II) oxide without releasing oxygen. If you try to dehydrate it in the presence of oxygen, a platinum (III) oxide hydrate is formed instead.

Individual evidence

↑ data sheet at Webelements
↑ ^a ^b ^c ^d ^e Simon Cotton: Chemistry of Precious Metals , 1997, p. 725.
^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1732.
↑ Template: CL Inventory / not harmonized There is not yet a harmonized classification for this substance . A labeling of platinum oxide in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), which was accessed on July 29, 2019, is reproduced from a self-classification by the distributor .

literature

AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , pp. 1732-1734.

[1] ta sheet at Webelements

[Cotton-2] Simon Cotton: Chemistry of Precious Metals , 1997, p. 725.

[3] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1732.

[4] Template: CL Inventory / not harmonized There is not yet a harmonized classification for this substance . A labeling of platinum oxide in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), which was accessed on July 29, 2019, is reproduced from a self-classification by the distributor .