Europium(III) chloride

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Europium(III) chloride
Names
IUPAC names
Europium(III) chloride
Europium trichloride
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.030.025 Edit this at Wikidata
EC Number
  • 233-040-4
RTECS number
  • LE7525000
UNII
  • InChI=1S/3ClH.Eu/h3*1H;/q;;;+3/p-3 checkY
    Key: NNMXSTWQJRPBJZ-UHFFFAOYSA-K checkY
  • InChI=1/3ClH.Eu/h3*1H;/q;;;+3/p-3
    Key: NNMXSTWQJRPBJZ-DFZHHIFOAZ
  • Cl[Eu](Cl)Cl
Properties
EuCl3
Molar mass 258.323 g/mol
366.41 g/mol (hexahydrate)
Melting point 632 °C (1,170 °F; 905 K) decomposes
Solubility in other solvents Soluble
Structure
UCl3 type), hP8
P63/m, No. 176
Tricapped trigonal prismatic
(nine-coordinate)
Related compounds
Other anions
 Europium(III) oxide
Other cations
 Samarium(III) chloride
Gadolinium(III) chloride
Related compounds
Europium dichloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Europium(III) chloride is an

hygroscopic it rapidly absorbs water to form a white crystalline hexahydrate
, EuCl3·6H2O, which is colourless. The compound is used in research.

Preparation

Treating

oxychloride
. Anhydrous EuCl3 is often prepared by the "ammonium chloride route," starting from either Eu2O3[1][2] or hydrated europium chloride (EuCl3·6H2O) by heating carefully to 230 °C.[3] These methods produce (NH4)2[EuCl5]:

10 NH4Cl + Eu2O3 → 2 (NH4)2[EuCl5] + 6 NH3 + 3 H2O
EuCl3·6H2O + 2 NH4Cl → (NH4)2[EuCl5] + 6 H2O

The pentachloride decomposes thermally according to the following equation:

(NH4)2[EuCl5] → 2 NH4Cl + EuCl3

The thermolysis reaction proceeds via the intermediary of (NH4)[Eu2Cl7].

Reactions

Europium(III) chloride is a precursor to other europium compounds. It can be converted to the corresponding

THF
and requires a period at reflux.

EuCl3 + 3 LiN(SiMe3)2 → Eu(N(SiMe3)2)3 + 3 LiCl

Eu(N(SiMe3)2)3 is a starting material for the more complicated coordination complexes.

Reduction with

organometallic compounds of europium(II), such as bis(pentamethylcyclopentadienyl)europium(II) complexes.[5][6] Europium(III) chloride can be used as a starting point for the preparation of other europium salts
.

Structure

In the solid state, it crystallises in the UCl3 motif. The Eu centres are nine-coordinate.[7]

Space-filling image of EuCl3.

Bibliography

  • Weast, R. C., ed. (1972). Handbook of Chemistry and Physics (53rd ed.). Cleveland, OH: Chemical Rubber Co.

References

  1. ^ Meyer, G. (1989). The Ammonium Chloride Route to Anhydrous Rare Earth Chlorides-The Example of YCl3. Inorganic Syntheses. Vol. 25. pp. 146–150.
    ISBN 978-0-470-13256-2
    .
  2. ISBN 3-13-103021-6
    .
  3. doi:10.1016/0022-1902(62)80034-7
    .
  4. doi:10.1039/DT9730001021
    .
  5. doi:10.1021/ic50212a031
    .
  6. doi:10.1021/om00138a001
    .
  7. ISBN 978-0-08-037941-8
    .
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