Protactinium(V) chloride

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
Density	3.74 g/cm3
Melting point	306 °C (583 °F; 579 K)
Boiling point	420 °C (788 °F; 693 K)
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.

Protactinium(V) chloride can react with boron tribromide at high temperatures to form protactinium(V) bromide. It also reacts with fluorine to form protactinium(V) fluoride at high temperatures.