Palladium (II) iodide

Crystal structure
	__ Pd 2+ __ I -
General
Surname	Palladium (II) iodide
other names	Palladium diiodide; Palladium iodide; Palladium iodide (obsolete);
Ratio formula	PdI 2
Brief description	black solid
External identifiers / databases
EC number	232-203-7
ECHA InfoCard	100.029.276
PubChem	82251
Wikidata	Q2357676
properties
Molar mass	360.23 g mol −1
Physical state	firmly
density	6.003 g cm −3
Melting point	350 ° C (decomposition)
solubility	slightly soluble in water
safety instructions
GHS labeling of hazardous substances Caution
H and P phrases	H: 317
	P: 261-280-302 + 352-321-363-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Palladium (II) iodide is an inorganic chemical compound of palladium from the group of iodides .

Extraction and presentation

Palladium (II) iodide can be obtained by reacting a very dilute solution of palladium in nitric acid with sodium iodide at 80 ° C.

The high-temperature modification α-palladium (II) iodide can be produced by reacting the elements at a reaction temperature above 600 ° C. The γ-modification is produced as a finely crystalline, almost X-ray amorphous powder through the precipitation of palladium (II) compounds with iodine salts from aqueous H ₂ PdCl ₄ solution at room temperature. When this modification is heated in dilute hydrogen iodide solution, it is converted into the β phase from approx. 140 ° C.

properties

Palladium (II) iodide is an almost X-ray amorphous, black powder. It is insoluble in acids but soluble in a potassium iodide solution. The compound comes in three modifications. The α-modification has an orthorhombic crystal structure with the space group Pnmn (space group no. 58, position 5) . Template: room group / 58.5

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g data sheet Palladium (II) iodide, Premion®, 99.998% (metals basis), Pd 29% min from AlfaAesar, accessed on August 31, 2013 ( PDF )(JavaScript required) .
↑ ^a ^b 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. 17.
↑ Kristin Brendel: Binary and ternary compounds of the platinum metals palladium and rhodium with tellurium and halogens. Preparations and structural characterization , dissertation, University of Freiburg 2001, urn : nbn: de: bsz: 25-opus-1971 .
^ Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 668 ( limited preview in Google Book search).

[Alfa-1] ↑ ^a ^b ^c ^d ^e ^f ^g data sheet Palladium (II) iodide, Premion®, 99.998% (metals basis), Pd 29% min from AlfaAesar, accessed on August 31, 2013 ( PDF )(JavaScript required) .

[brauer-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. 17.

[3] Kristin Brendel: Binary and ternary compounds of the platinum metals palladium and rhodium with tellurium and halogens. Preparations and structural characterization , dissertation, University of Freiburg 2001, urn : nbn: de: bsz: 25-opus-1971 .

[Jean_d’Ans,_Ellen_Lax,_Roger_Blachnik-4] Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 668 ( limited preview in Google Book search).