Erbium (III) chloride

Crystal structure
__ Er 3+      __ Cl -
Space group	C 2 / m (No. 12)
General
Surname	Erbium (III) chloride
other names	Erbium trichloride
Ratio formula	ErCl 3
Brief description	pink solid
External identifiers / databases
CAS number 10138-41-7 10025-75-9 (hexahydrate) PubChem 66277 Wikidata Q408349
properties
Molar mass	273.62 g mol −1
Physical state	firmly
density	4.1 g cm −3
Melting point	774 ° C 165 ° C (hexahydrate)
boiling point	1500 ° C
solubility	soluble in water
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 315-319-335 P: 261-305 + 351 + 338
Toxicological data	4,417 mg kg −1 ( LD 50 ,  mouse ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Erbium (III) chloride is a chemical compound from the group of chlorides .

Extraction and presentation

Erbium (III) chloride can be obtained by reacting erbium (III) oxide or erbium (III) carbonate and ammonium chloride.

${\displaystyle \mathrm {Er_{2}O_{3}+6\ NH_{4}Cl\longrightarrow 2\ ErCl_{3}+6\ NH_{3}+3\ H_{2}O} }$

The hexahydrate is created by the reaction of erbium with hydrochloric acid . This can be converted to the anhydrate form by reaction with thionyl chloride .

${\displaystyle \mathrm {2\ Er+6\ HCl\longrightarrow 2\ ErCl_{3}+3\ H_{2}} }$

Erbium (III) chloride can also be synthesized directly from the elements erbium and chlorine .

${\displaystyle \mathrm {2\ Er+3\ Cl_{2}\longrightarrow 2\ ErCl_{3}} }$

properties

Erbium (III) chloride hexahydrate under UV light

Erbium (III) chloride is an almost colorless, slightly pinkish-red solid. Its hexahydrate is a pink, hygroscopic solid. Both are soluble in water. Erbium (III) chloride has a monoclinic crystal structure with the space group C 2 / m (space group no. 12) corresponding to that of aluminum (III) chloride . The hexahydrate also has a monoclinic crystal structure with the space group P 2 / n (no. 13, position 2) . Erbium (III) chloride is a good catalyst for the acylation of alcohols and phenols.

use

Erbium (III) chloride is used to make pure erbium. It can also be used as a starting material for new edge-bridged octahedral M6 cluster compounds such as CsErTa ₆ Cl ₁₈ , for which electron and stability studies are carried out.

Individual evidence

1. ↑ ^{a b c d} Jean D'Ans, Ellen Lax: Pocket book for chemists and physicists . 2007, ISBN 978-3-540-60035-0 , pp. 444 ( limited preview in Google Book search).
2. ↑ ^{a b c d e f g h} data sheet Erbium (III) chloride, anhydrous, powder, 99.9% trace metals basis from Sigma-Aldrich , accessed on April 30, 2012 ( PDF ).
3. ↑ Datasheet Erbium (III) chloride hexahydrate, 99.995% trace metals basis from Sigma-Aldrich , accessed on April 30, 2012 ( PDF ).
4. ↑ ^{a b} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 897.
5. ↑ Web elements: Erbium
6. ↑ Renato Dalpozzo, Antonio De Nino, Loredana Maiuolo, Manuela Oliverio, Antonio Procopio, Beatrice Russo, Amedeo Tocci: Erbium (III) Chloride: a Very Active Acylation Catalyst , Australian Journal of Chemistry, 2006, 60 (1), p. 75 -79, doi : 10.1071 / CH06346 .
7. ^ John Emsley: Nature's building blocks: an AZ guide to the elements . Oxford University Press, 2003, ISBN 978-0-19-850340-8 , pp. 137 ( limited preview in Google Book search).