Protactinium(V)_iodide
Protactinium(V) iodide
Chemical compound
Protactinium(V) iodide is an inorganic compound, with the chemical formula of PaI5.
Quick Facts Identifiers, Properties ...
| Identifiers | |
|---|---|
| Properties | |
| I5Pa | |
| Molar mass | 865.55823 g·mol−1 |
| Appearance | black needle crystals[1] |
| Related compounds | |
Other anions |
Protactinium(V) fluoride Protactinium(V) chloride Protactinium(V) bromide |
Other cations |
Praseodymium(III) iodide Thorium(IV) iodide Uranium(IV) iodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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It can be prepared by the reaction of metals protactinium and iodine, or by reacting protactinium(V) chloride, protactinium(V) bromide or protactinium(V) oxide with silicon tetraiodide.[2]
It reacts with antimony trioxide in a vacuum at 150 °C to give the iodide oxides PaOI3 and PaO2I; it reacts with protactinium(V) bromide at 350 °C to obtain mixed halides PaBr3I2.[2] It reacts with the monocarbide at 600 °C to give tetraiodide.[3]
Aristid von Grosse was able to produce pure metallic protactinium with the decomposition of protactinium(V) iodide.[4][5]
When heated at 300 °C for a long time, it decomposes and iodine is released:[1]
- PaI5 → PaI3 + I2
- V. Scherer, F. Weigel, M. Van Ghemen (December 1967). "Evidence for the existence of protactinium(III) in solid state". Inorganic and Nuclear Chemistry Letters. 3 (12): 589–595. doi:10.1016/0020-1650(67)80033-3. Archived from the original on 2018-06-17. Retrieved 2021-09-25.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - D. Brown, J. F. Easey, P. J. Jones (1967). "Protactinium(V) iodides". Journal of the Chemical Society A: Inorganic, Physical, Theoretical: 1698–1702. doi:10.1039/j19670001698. ISSN 0022-4944. Retrieved 2021-09-25.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - Brown, David; De Paoli, Giovanni; Whittaker, Brian. Conversion of protactinium monocarbide to the penta- and tetrahalides. Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1972-1999), 1976. 14: 1336-1338.
- von Grosse, Aristid (1934). "Element 91". Science. 80 (2084): 512–516. Bibcode:1934Sci....80..512G. doi:10.1126/science.80.2084.512. PMID 17734249.
- von Grosse, Aristid (1935). "Zur Herstellung von Protactinium" [For the production of protactinium]. Berichte der deutschen chemischen Gesellschaft (A and B Series) (in German). 68 (2): 307–309. doi:10.1002/cber.19350680218.