Phosphorus pentaiodide

Phosphorus pentaiodide
Names
	IUPAC name Phosphorus(V) iodide
	Other names Pentaiodophosphorane; Pentaiodophosphorus; Phosphorus pentaiodide; Tetraiodophosphonium iodide;
Identifiers
CAS Number	66656-29-9 ;
3D model (JSmol)	Interactive image;
ChemSpider	10459963;
PubChem CID	12617301;
CompTox Dashboard (EPA)	DTXSID30504485 ;
	InChI InChI=1S/I5P/c1-6(2,3,4)5 Key: NCCBCEHAGCSKEA-UHFFFAOYSA-N;
	SMILES P(I)(I)(I)(I)I;
Properties
Chemical formula	PI5
Molar mass	665.49611 g·mol−1
Appearance	Brown-black crystalline solid (disputed)
Melting point	41 °C (106 °F; 314 K) (disputed)
Related compounds
Related compounds	Phosphorus pentafluoride; Phosphorus pentachloride; Phosphorus pentabromide;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Phosphorus pentaiodide is a hypothetical inorganic compound with formula P I₅. The existence of this compound has been claimed intermittently since the early 1900s. The claim is disputed: "The pentaiodide does not exist (except perhaps as PI₃·I₂, but certainly not as [PI₄]⁺I⁻...)".