Protactinium(V) iodide

Protactinium(V) iodide  Identifiers

CAS Number

* 17497-66-4 Y

Properties

Chemical formula

| 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).

Infobox references

Chemical compound

Protactinium(V) iodide is an inorganic compound, with the chemical formula of PaI5.

## Preparation

[edit]

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]

## Properties

[edit]

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

## References

[edit]

1. ^ a b 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)
2. ^ a b 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)
3. ^ 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.
4. ^ von Grosse, Aristid (1934). "Element 91". Science. 80 (2084): 512–516\. Bibcode:1934Sci....80..512G. doi:10.1126/science.80.2084.512. PMID 17734249.
5. ^ 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.

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* t
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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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Salts and covalent derivatives of the iodide ion

| HI
+H |  |  |  | He

|
|
|
|

LiI | BeI2 | BI3
+BO3 | CI4
+C | NI3
NH4I
+N | I2O4
I2O5
I2O6
I4O9 | IF
IF3
IF5
IF7 | Ne
NaI | MgI2 | AlI
AlI3 | SiI4 | PI3
P2I4

PI5 | S2I2 | ICl
ICl3 | Ar
KI | CaI2 |  | ScI3 | TiI2
TiI3
TiI4 | VI2
VI3 | CrI2
CrI3
CrI4 | MnI2 | FeI2
FeI3 | CoI2 | NiI2
-Ni | CuI | ZnI2 | GaI
GaI3 | GeI2
GeI4
+Ge | AsI3
As2I4
+As | Se  | IBr
IBr3 | Kr
RbI
RbI3 | SrI2 |  | YI3 | ZrI2
ZrI3
ZrI4 | NbI4
NbI5 | MoI2
MoI3 | TcI3 | RuI3 | RhI3 | PdI2 | AgI | CdI2 | InI
InI3 | SnI2
SnI4 | SbI3
+Sb | TeI4
+Te | I−

3 | Xe
CsI
CsI3 | BaI2 |  | LuI3 | HfI3
HfI4 | TaI4
TaI5 | WI2
WI3
WI4 | ReI3
ReI
4 | OsI
OsI2
OsI3 | IrI3
IrI
4 | PtI2
PtI4 | AuI
AuI3 | Hg2I2
HgI2 | TlI
TlI3 | PbI2 | BiI3 | PoI2
PoI4 | AtI | Rn
Fr  | RaI2 |  | Lr  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og
| ↓  |  |
| LaI2
LaI3 | CeI2
CeI3 | PrI2
PrI3 | NdI2
NdI3 | PmI3 | SmI2
SmI3 | EuI2
EuI3 | GdI2
GdI3 | TbI3 | DyI2
DyI
3 | HoI3 | ErI3 | TmI2
TmI3 | YbI2
YbI3
AcI3 | ThI2
ThI3
ThI4 | PaI4
PaI5 | UI3
UI4 | NpI3 | PuI3 | AmI2
AmI3 | CmI3 | BkI
3 | CfI

CfI
3 | EsI2
EsI3 | Fm  | Md  | No

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Halides of actinides

|  | Ac | Th | Pa | U | Np | Pu | Am | Cm | Bk | Cf | Es | Fm

|
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|
|
|
|
|
|
|
|
|
|

+6  |  |  |  | UF6
UCl6 | NpF6 | PuF6 | AmF6 | CmF6 |  |  | EsF6 |
+5  |  |  | PaF5
PaCl5
PaBr5
PaI5 | UF5
UCl5
UBr5 | NpF5 | PuF5 |  |  |  |  |  |
+4  |  | ThF4
ThCl4
ThBr4
ThI4 | PaF4
PaCl4
PaBr4
PaI4 | UF4
UCl4
UBr4
UI4 | NpF4
NpCl4
NpBr4 | PuF4 | AmF4 | CmF4 | BkF4 | CfF4 | EsF4 |
+3  | AcF3
AcCl3
AcBr3
AcI3 | ThF3
ThCl3
ThI3 |  | UF3
UCl3
UBr3
UI3 | NpF3
NpCl3
NpBr3
NpI3 | PuF3
PuCl3
PuBr3
PuI3 | AmF3
AmCl3
AmBr3
AmI3 | CmF3
CmCl3
CmBr3
CmI3 | BkF3
BkCl3
BkBr3
BkI3 | CfF3
CfCl3
CfBr3
CfI3 | EsF3
EsCl3
EsBr3
EsI3 | FmCl3
+2  |  | ThI2
ThCl2 |  |  |  |  | AmF2
AmCl2
AmBr2
AmI2 |  |  | CfI2
CfCl2 | EsCl2
EsBr2
EsI2 | FmCl2
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