Protactinium(V) chloride

Protactinium(V) chloride is the chemical compound composed of protactinium and chlorine with the formula PaCl₅. It forms yellow monoclinic crystals and has a unique structure composed of chains of 7 coordinate, pentagonal bipyramidal, protactinium atoms sharing edges.[3]

Protactinium(V) chloride

Names
IUPAC name Protactinium(V) chloride
Other names Protactinium pentachloride, Protactinium chloride
Identifiers
CAS Number	13760-41-3
3D model (JSmol)	Interactive image
ChemSpider	9222996
PubChem CID	11047828
InChI InChI=1S/5ClH.Pa/h5*1H;/q;;;;;+5/p-5 Key: QRPCDPJECLHYKR-UHFFFAOYSA-I
SMILES Cl[Pa](Cl)(Cl)(Cl)Cl
Properties
Chemical formula	PaCl5
Molar mass	408.301 g/mol
Appearance	yellow monoclinic crystals[1]
Density	3.74 g/cm^3[1]
Melting point	306 °C (583 °F; 579 K)[1]
Boiling point	420 °C (788 °F; 693 K)[2]
Structure
Crystal structure	monoclinic, mS24
Space group	c12/c1, #15
Coordination geometry	Pa, 7, pentagonal bipyramidal Cl, 1 and 2
Related compounds
Other cations	Praseodymium(III) chloride Uranium(IV) chloride Thorium(IV) chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

References

1. Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. p. 484. ISBN 0849305942. Retrieved 2008-07-17.
2. "Chemistry: WebElements Periodic Table: Professional Edition: Protactinium: compound data (protactinium (V) chloride)". WebElements. Retrieved 2008-07-17.
3. R. P. Dodge, G. S. Smith, Q. Johnson, R. E. Elson: „The Crystal Structure of Protactinium Pentachloride“, Acta Crystallogr., 1967, 22, 85–89; doi:10.1107/S0365110X67000155.