Platinum (IV) chloride

Crystal structure
__ Pt 4+      __ Cl -
General
Surname	Platinum (IV) chloride
other names	Platinum tetrachloride Platinum tetrachloratum
Ratio formula	PtCl 4
Brief description	red-brown solid
External identifiers / databases
CAS number 13454-96-1 15869-63-3 (tetrahydrate) EC number 236-645-1 ECHA InfoCard 100.033.300 PubChem 26031 ChemSpider 24245 Wikidata Q426312
properties
Molar mass	336.90 g mol −1
Physical state	firmly
density	4.30 g cm −3  (20 ° C) 2.43 g cm −3
Melting point	Decomposes at 370 ° C
solubility	good in water (587 g l −1 at 25 ° C)
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 301-314-317-334 P: 260-264-280-301 + 330 + 331-305 + 351 + 338-310
Toxicological data	276 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 (IV) chloride is an inorganic chemical compound of platinum from the group of chlorides .

Extraction and presentation

Platinum (IV) chloride is formed when platinum is dissolved in aqua regia by the decomposition of the hexachloridoplatinic acid which is initially formed ; the deep, but purely yellow solution gives a red-brown salt mass when it evaporates, which turns brown-red when the crystal water is expelled.

It can also be obtained by chlorinating platinum with sulfuryl chloride in vacuo at 350 ° C.

${\displaystyle \mathrm {Pt+2\ SO_{2}Cl_{2}\longrightarrow PtCl_{4}+2\ SO_{2}} }$

properties

Platinum (IV) chloride is a red-brown, crystalline and hygroscopic salt. It tastes badly sharp, metallic, is soluble in water , ethanol and diethyl ether , colors organic substances brownish-red, gives greenish-gray, insoluble platinum (II) chloride PtCl ₂ when heated and ultimately leaves behind platinum .

It is hygroscopic and absorbs water up to the pale yellow pentahydrate PtCl ₄ · 5H ₂ O on standing in air .

Platinum (IV) chloride has an orthorhombic crystal structure with the space group Pbca (space group no. 61) .

Individual evidence

1. ↑ ^{a b c d} 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. 1709.
2. ↑ ^{a b c d e f} Entry on platinum (IV) chloride in the GESTIS substance database of the IFA , accessed on July 23, 2016(JavaScript required) .
3. ^ ^{A b} Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 676 ( limited preview in Google Book search).

literature

• Cotton, SA Chemistry of Precious Metals , Chapman and Hall (London): 1997. ISBN 0-7514-0413-6 .