Protactinium(V) chloride

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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
CompTox Dashboard (EPA)	DTXSID401045196
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/cm³^[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 anions	Protactinium(V) fluoride Protactinium(V) bromide Protactinium(V) iodide
Other cations	Praseodymium(III) chloride Uranium(IV) chloride Thorium(IV) chloride
Related compounds	Protactinium(IV) chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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 can react with boron tribromide at high temperatures to form protactinium(V) bromide.^[4] It also reacts with fluorine to form protactinium(V) fluoride at high temperatures.^[4]

References

^ ^a ^b ^c Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. p. 484. ISBN 0849305942. Retrieved 2008-07-17.
^ "Chemistry: WebElements Periodic Table: Professional Edition: Protactinium: compound data (protactinium (V) chloride)". WebElements. Retrieved 2008-07-17.^{[permanent dead link‍]}
^ 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.
^ ^a ^b Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 1177.

v t e Protactinium compounds
Pa(II)	PaO
Pa(III)	PaH₃ PaN
Pa(IV)	PaO₂ PaCl₄ PaBr₄ PaF₄ PaI₄ PaOCl₂ PaC Pa(C₈H₈)₂
Pa(V)	Pa₂O₅ PaF₅ PaCl₅ PaBr₅ PaI₅ PaO₂F PaO₂Cl PaO₂I PaO(NO₃)₃

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