Diphosphorus tetraiodide

Diphosphorus tetraiodide
Names
	IUPAC name Diphosphorus tetraiodide
	Preferred IUPAC name Tetraiododiphosphane
	Other names Phosphorus(II) iodide
Identifiers
CAS Number	13455-00-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	75322;
ECHA InfoCard	100.033.301
EC Number	236-646-7;
PubChem CID	83484;
CompTox Dashboard (EPA)	DTXSID6065474 ;
	InChI InChI=1S/I4P2/c1-5(2)6(3)4 Key: YXXQTQYRRHHWFL-UHFFFAOYSA-N;
	SMILES P(P(I)I)(I)I;
Properties
Chemical formula	P2I4
Molar mass	569.57 g/mol
Appearance	Orange crystalline solid
Melting point	125.5 °C (257.9 °F; 398.6 K)
Boiling point	Decomposes
Solubility in water	Decomposes
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314
Precautionary statements	P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501
Flash point	Non-flammable
Related compounds
Other anions	Diphosphorus tetrafluoride; Diphosphorus tetrachloride; Diphosphorus tetrabromide
Other cations	diarsenic tetraiodide
Related Binary Phosphorus halides	phosphorus triiodide
Related compounds	diphosphane; diphosphines
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Diphosphorus tetraiodide is an orange crystalline solid with the formula P₂I₄. It has been used as a reducing agent in organic chemistry. It is a rare example of a compound with phosphorus in the +2 oxidation state, and can be classified as a subhalide of phosphorus. It is the most stable of the diphosphorus tetrahalides.^[1]

^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.

[G&W-1] Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.

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