Thulium (II) iodide

Crystal structure
	__ Tm 2+ __ I -
General
Surname	Thulium (II) iodide
other names	Thulium diiodide
Ratio formula	TmI 2
Brief description	purple to black solid
External identifiers / databases
EC number	622-686-6
ECHA InfoCard	100.151.436
PubChem	5231385
Wikidata	Q16857501
properties
Molar mass	422.74 g mol −1
Physical state	firmly
Melting point	756 ° C
solubility	soluble in tetrahydrofuran
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 .

Thulium (II) iodide is an inorganic chemical compound of thulium from the group of iodides .

Extraction and presentation

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

{\ displaystyle \ mathrm {Tm + 2 \ TmI_ {3} \ longrightarrow 3 \ TmI_ {2}}}

It can also be represented by the reaction of thulium with mercury (II) iodide .

{\ displaystyle \ mathrm {Tm + HgI_ {2} \ longrightarrow TmI_ {2} + Hg}}

Direct representation from iodine and thulium is also possible.

{\ displaystyle \ mathrm {Tm + I_ {2} \ longrightarrow TmI_ {2}}}

properties

Thulium (II) iodide is a 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, thulium (II) iodide changes into hydrates when moisture is absorbed , but these are unstable and more or less rapidly transform into oxide iodides with evolution of hydrogen . These processes take place much faster with water. The compound has a crystal structure of the cadmium (II) iodide type.

use

Thulium (II) iodide is used to promote the cross-coupling of 2-acetylthiophene or ethyl 2-thiophene carboxylate with aldehydes and ketones in tetrahydrofuran at room temperature. It is also used as a reducing agent similar to samarium (II) iodide .

Individual evidence

↑ ^a ^b ^c ^d ^e data sheet Thulium (II) iodide, anhydrous, powder, ≥99.9% from Sigma-Aldrich , accessed on May 2, 2014 ( PDF ).
↑ ^a ^b ^c ^d ^e Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 1081.
^ 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. 258 ( limited preview in Google Book search).
^ 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).

[Sigma-1] ↑ ^a ^b ^c ^d ^e data sheet Thulium (II) iodide, anhydrous, powder, ≥99.9% from Sigma-Aldrich , accessed on May 2, 2014 ( PDF ).

[brauer-2] Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 1081.

[Gschneidner_258-3] 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. 258 ( limited preview in Google Book search).

[Gschneidner_247-4] 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).