Promethium(III) chloride

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Promethium(III) chloride
Other names Promethium trichloride
Identifiers
InChI InChI=1/3ClH.Pm/h3*1H;/q;;;+3/p-3
InChIKey KAKNBYVEBALXNX-DFZHHIFOAB
Standard InChI InChI=1S/3ClH.Pm/h3*1H;/q;;;+3/p-3
Standard InChIKey KAKNBYVEBALXNX-UHFFFAOYSA-K
CAS number [13779-10-7]
EC number 237-420-0
ChemSpider 14296263
Properties[1]
Chemical formula PmCl3
Molar mass 253.27 g mol−1 [note 1]
Appearance lavender solid
Melting point

655 °C

Structure[1][3]
Crystal structure Uranium trichloride
Coordination geometry tricapped trigonal prismatic (Pm3+)
Related compounds
Other anions Promethium(III) fluoride
Promethium(III) bromide
Promethium(III) iodide
Other cations Praseodymium(III) chloride
Neodymium(III) chloride
Samarium(III) chloride
Europium(III) chloride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Promethium(III) chloride, PmCl3, is the only known chloride of promethium. It is prepared (on a 100-µg scale) by reacting gaseous hydrogen chloride with promethium(III) oxide at 500 °C, and has the uranium trichloride structure with nine-coordinate promethium, isostructural with NdCl3 and SmCl3.[1]

Notes and references

Notes

  1. The molar mass is based on promethium-147 (t½ = 2.6234(2) a; Ar = 146.915 1385(26)),[2] the most commonly encountered isotope of promethium.

References

  1. 1.0 1.1 1.2 Cotton, Simon Lanthanide and Actinide Chemistry, 2nd ed.; Wiley: New York, 2006; pp 115–17. ISBN 0470010061.
  2. Audi, G.; Bersillon, O.; Blachot, J.; Wapstra, A. H. The NUBASE evaluation of nuclear and decay properties. Nucl. Phys. A 2003, 729, 3–128. doi:10.1016/j.nuclphysa.2003.11.001, <http://amdc.in2p3.fr/nubase/Nubase2003.pdf>.
  3. Wilmarth, W. R.; Haire, R. G.; Young, J. P.; Ramey, D. W.; Peterson, J. R. Absorption spectrophotometric and X-ray diffraction studies of the trihalides of promethium in the solid state. J. Less Common Met. 1988, 141 (2), 275–84. DOI: 10.1016/0022-5088(88)90413-4.

Further reading

External links

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