Ruthenium (III) iodide

General
Surname	Ruthenium (III) iodide
other names	Ruthenium triiodide
Molecular formula	RuI 3
Brief description	black solid
External identifiers / databases
CAS number 13896-65-6 208346-20-7 (hydrate) EC number 237-664-8 ECHA InfoCard 100.034.226 PubChem 176256 ChemSpider 153531 Wikidata Q4202671
properties
Molar mass	481.78 g mol −1
Physical state	firmly
Melting point	590 ° C (decomposition)
solubility	almost insoluble in water
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 315-319-335 P: 261-280-305 + 351 + 338-304 + 340-405-501
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Ruthenium (III) iodide is an inorganic chemical compound of ruthenium from the group of iodides .

Extraction and presentation

Ruthenium (III) iodide can be obtained by reacting ruthenium (III) chloride hydrate with potassium iodide .

${\displaystyle \mathrm {RuCl_{3}\cdot xH_{2}O+3\ KI\longrightarrow RuI_{3}+3\ KCl+xH_{2}O} }$

It can also be prepared by the reaction of ruthenium tetroxide with hydriodic acid .

properties

Ruthenium (III) iodide is a black solid. It is not substantially soluble in water and organic solvents. In air, oxidation takes place at around 200 ° C , and thermal decomposition at temperatures above 300 ° C. The compound has an orthorhombic crystal structure with the space group Pmmn (space group no. 59) and the lattice parameters a = 647 pm, b = 1120.5 pm and c = 585.5 pm.

Individual evidence

1. ↑ ^{a b c d e f g} data sheet Ruthenium (III) iodide, anhydrous, Ru 20.5% min from AlfaAesar, accessed on April 29, 2017 ( PDF )(JavaScript required) .
2. ↑ ^{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. 1750.
3. ↑ Catherine E. Housecroft: Inorganic Chemistry . Pearson Education, 2005, ISBN 0-13-039913-2 , pp. 675 ( limited preview in Google Book search).