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| Names | |
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| IUPAC name
Protactinium(V) chloride | |
| Other names
Protactinium pentachloride, Protactinium chloride | |
| 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 |
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).
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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]
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