Chromium(II) iodide

Chromium(II) iodide
Names
	Other names chromous iodide
Identifiers
CAS Number	13478-28-9;
3D model (JSmol)	Interactive image;
ChemSpider	13318420;
PubChem CID	18626753;
CompTox Dashboard (EPA)	DTXSID20595261;
	InChI InChI=1S/Cr.2HI/h;2*1H/q+2;;/p-2 Key: BMSDTRMGXCBBBH-UHFFFAOYSA-L;
	SMILES [Cr+2].[I-].[I-];
Properties
Chemical formula	CrI2
Molar mass	305.8050 g·mol−1
Appearance	black deliquescent solid
Density	5.196 g/cm3
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chromium(II) iodide is the inorganic compound with the formula CrI₂. It is a red-brown or black solid. The compound is made by thermal decomposition of chromium(III) iodide. Like many metal diiodides, CrI₂ adopts the "cadmium iodide structure" motif, i.e., it features sheets of octahedral Cr(II) centers interconnected by bridging iodide ligands. Reflecting the effects of its d⁴ configuration, chromium's coordination sphere is highly distorted.

Treatment of chromium powder with concentrated hydroiodic acid gives a blue hydrated chromium(II) iodide, which can be converted to related acetonitrile complexes.

Cr + n H₂O + 2 HI → CrI₂(H₂O)_n + H₂

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.