Names | |
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IUPAC name
Protactinium(V) chloride
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Other names
Protactinium pentachloride, Protactinium chloride
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Identifiers | |
3D model (JSmol)
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ChemSpider | |
PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
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 | |
monoclinic, mS24 | |
c12/c1, #15 | |
Pa, 7, pentagonal bipyramidal Cl, 1 and 2 | |
Related compounds | |
Other anions
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Protactinium(V) fluoride Protactinium(V) bromide Protactinium(V) iodide |
Other cations
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Praseodymium(III) chloride Uranium(IV) chloride Thorium(IV) chloride |
Related compounds
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Protactinium(IV) chloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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]