Thiophosphoryl iodide

Thiophosphoryl iodide is an inorganic compound with the formula PSI₃.^[1]

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
CompTox Dashboard (EPA)	DTXSID00615471
InChI InChI=1S/I3PS/c1-4(2,3)5 Key: CVHICNBAVVKDQW-UHFFFAOYSA-N
SMILES S=P(I)(I)I
Properties
Chemical formula	PSI3
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

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 PSI₃ by the reaction of lithium iodide with thiophosphoryl bromide lead to the mixed thiophosphoryl halides PSBr₂I and PSBrI₂ instead.^[3]