Platinum (II) chloride

Crystal structure
__ Pt 2+      __ Cl -
General
Surname	Platinum (II) chloride
Ratio formula	PtCl 2
Brief description	green solid
External identifiers / databases
CAS number 10025-65-7 EC number 233-034-1 ECHA InfoCard 100.030.019 PubChem 2770 ChemSpider 2668 Wikidata Q420989
properties
Molar mass	266.00 g mol −1
Physical state	firmly
density	6.1 g cm −3
Melting point	581 ° C (decomposition)
solubility	almost insoluble in water
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 315-317-319-334 P: 260-262-280-302 + 352-304 + 341-305 + 351 + 338-342 + 311
Toxicological data	3423 mg kg −1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Platinum (II) chloride is one of several chlorides of the chemical element platinum . There are also platinum (IV) chloride and the mixed compound platinum (II, IV) chloride PtCl ₃ , which consists of platinum (II) and platinum (IV) chloride. It is a green solid at room temperature .

Extraction and presentation

Platinum (II) chloride is formed from the elements at 550 ° C.

${\displaystyle \mathrm {Pt+Cl_{2}\longrightarrow PtCl_{2}} }$

It can also be produced by decomposing platinum (IV) chloride or hexachloroplatinic acid at 360 ° C or by evaporating hydrochloric acid (only stable in solution) tetrachloroplatinic acid H ₂ [PtCl ₄ ] solutions in vacuo. The reduction of hexachloroplatinic acid with hydrazine and subsequent thermal treatment at 150 ° C is also possible:

${\displaystyle {\ce {2 H2[PtCl6] * 6 H2O + N2H4 * 2 HCl -> 2 H2[PtCl4] + N2 + 6 HCl + 12 H2O}}}$

${\displaystyle {\ce {H2[PtCl4] ->[T][] PtCl2 + 2 HCl}}}$

properties

Platinum (II) chloride occurs in two modifications , the black-red high-temperature modification α-PtCl ₂ , which is stable above 500 ° C, and the green β-modification, which is more stable at lower temperatures. β-PtCl ₂ crystallizes in a hexagonal crystal structure , with α-PtCl ₂ corner and edge-linked PtCl ₄ units are assumed.

Individual evidence

1. ↑ ^{a b c d e f g} Data sheet platinum (II) chloride (73% Pt) (PDF) from Merck , accessed on April 21, 2011.
2. ↑ Georg Brauer (ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1710.
3. ^ William E. Cooley and Daryle H. Busch: Platinum (II) chloride . In: Therald Moeller (Ed.): Inorganic Syntheses . tape 5 . McGraw-Hill, Inc., 1957, pp. 208-210 (English).
4. ^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1728.