Thiophosphoryl iodide

Names
Other names

* Phosphorothioic triiodide
* Phosphorus thioiodide
* Thiophosphoryl triiodide

Identifiers

CAS Number

* 63972-04-3

3D model (JSmol)

* Interactive image

PubChem CID

* 21517233

InChI

* InChI=1S/I3PS/c1-4(2,3)5

Key: CVHICNBAVVKDQW-UHFFFAOYSA-N

SMILES

* S=P(I)(I)I

Properties

Chemical formula

| PSI

Molar mass | 443.75 g·mol−1
Appearance  | red-brown solid[1]
Melting point |  48 °C (118 °F; 321 K)
Boiling point |  decomposes
Structure

Molecular shape

| Tetrahedral at the P atom
Related compounds

Related compounds

* Phosphorus triiodide
* Phosphoryl iodide
* Thiophosphoryl fluoride
* Thiophosphoryl chloride
* Thiophosphoryl bromide
* Phosphorothioic chloride difluoride

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

Tracking categories (test):

* SizeSet

Thiophosphoryl iodide is an inorganic compound with the formula PSI
3.[1]

## Preparation

Thiophosphoryl iodide can be prepared by reacting phosphorus triiodide with sulfur in carbon disulfide at 10–15 °C in the dark for several days.[1][2]

Attempts to synthesise PSI
3 by the reaction of lithium iodide with thiophosphoryl bromide lead to the mixed thiophosphoryl halides PSBr
2I and PSBrI
2 instead.[3]

## References

1. ↑ 1.0 1.1 1.2 Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 501–503. ISBN 978-0-08-037941-8.
2. ↑ Arthur D. F. Toy (1975). The Chemistry of Phosphorus. Permanon Texts in Inorganic Chemistry. 3. Permanon Press. p. 438. ISBN 9781483139593.
3. ↑ Dillon, K. B.; Craveirinha Dillon, M. G.; Waddington, T. C. (1977). "The identification of some new thiophosphoryl compounds containing P–I bonds by means of 31P N.M.R. spectroscopy". Inorg. Nucl. Chem. Lett. 13 (8): 349–353. doi:10.1016/0020-1650(77)80109-8.

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*[CID]: Compound ID