Dysprosium (II) iodide

Crystal structure
	__ Dy 2+ __ I -
General
Surname	Dysprosium (II) iodide
other names	Dysprosium diiodide
Ratio formula	DyI 2
Brief description	dark purple to black solid
External identifiers / databases
EC number	622-765-5
ECHA InfoCard	100.151.507
PubChem	71431174
Wikidata	Q15628236
properties
Molar mass	416.31 g mol −1
Physical state	firmly
Melting point	659 ° C
safety instructions
GHS labeling of hazardous substances Caution
H and P phrases	H: 315-319-335
	P: 261-305 + 351 + 338
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Dysprosium (II) iodide is an inorganic chemical compound of dysprosium from the group of iodides .

Extraction and presentation

Dysprosium (II) iodide can be obtained by reducing dysprosium (III) iodide with dysprosium in a vacuum at 800 to 900 ° C.

{\ displaystyle \ mathrm {Dy + 2 \ DyI_ {3} \ longrightarrow 3 \ DyI_ {2}}}

It is also possible to display it by reacting dysprosium with mercury (II) iodide .

{\ displaystyle \ mathrm {Dy + HgI_ {2} \ longrightarrow DyI_ {2} + Hg}}

Direct representation from iodine and dysprosium is also possible.

{\ displaystyle \ mathrm {Dy + I_ {2} \ longrightarrow DyI_ {2}}}

properties

Dysprosium (II) iodide is a dark purple to black solid. The connection is extremely hygroscopic and can only be stored and handled under carefully dried protective gas or in a high vacuum. In air it changes into hydrates with moisture absorption , but these are unstable and more or less quickly transform into oxide iodides with the evolution of hydrogen. These processes take place much faster with water. The compound has a crystal structure of the cadmium chloride type. The compound reacts with organic compounds such as tetrahydrofuran , butanol or phenol to form complex compounds.

use

Dysprosium (II) iodide is used to produce trichlorosilyl radicals from silicon chloride to catalyze the cyclotrimerization of alkynes to substituted benzenes .

Individual evidence

↑ ^a ^b ^c ^d ^e Georg Brauer , with the collaboration of Marianne Baudler u. a. (Ed.): Handbook of Preparative Inorganic Chemistry . 3rd, revised edition. tape I . Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , pp. 1081 .
↑ ^a ^b ^c ^d data sheet Dysprosium (II) iodide, anhydrous, powder, ≥99.9% trace metals basis from Sigma-Aldrich , accessed on May 2, 2014 ( PDF ).
^ ^A ^b Karl A. Jr. Gschneidner, Jean-Claude Bunzli, Vitalij K. Pecharsky: Handbook on the Physics and Chemistry of Rare Earths . Elsevier, 2009, ISBN 0-08-093257-6 , pp. 247 ( limited preview in Google Book search).
^ Z. Zhu, C. Wang, X. Xiang, C. Pi, X. Zhou: DyI2 initiated mild and highly selective silyl radical-catalyzed cyclotrimerization of terminal alkynes and polymerization of MMA. In: Chem. Commun. (Camb.). 2006, pp. 2066-2068, PMID 16767277 .

[brauer-1] Georg Brauer , with the collaboration of Marianne Baudler u. a. (Ed.): Handbook of Preparative Inorganic Chemistry . 3rd, revised edition. tape I . Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , pp. 1081 .

[Sigma-2] ta sheet Dysprosium (II) iodide, anhydrous, powder, ≥99.9% trace metals basis from Sigma-Aldrich , accessed on May 2, 2014 ( PDF ).

[Gschneidner-3] A ^b Karl A. Jr. Gschneidner, Jean-Claude Bunzli, Vitalij K. Pecharsky: Handbook on the Physics and Chemistry of Rare Earths . Elsevier, 2009, ISBN 0-08-093257-6 , pp. 247 ( limited preview in Google Book search).

[PMID16767277-4] Z. Zhu, C. Wang, X. Xiang, C. Pi, X. Zhou: DyI2 initiated mild and highly selective silyl radical-catalyzed cyclotrimerization of terminal alkynes and polymerization of MMA. In: Chem. Commun. (Camb.). 2006, pp. 2066-2068, PMID 16767277 .