Chromium(II) iodide

In this article we will explore in depth Chromium(II) iodide, a topic that has captured the attention of various disciplines and that arouses great interest in today's society. Chromium(II) iodide is a topic that has been the subject of debate and study for a long time, and its relevance is still evident today. Throughout this article, we will examine the various facets of Chromium(II) iodide, from its origins to its impact on everyday life, as well as possible implications for the future. In order to provide a complete view of Chromium(II) iodide, we will analyze its positive and negative aspects, as well as its possible consequences on a personal, social and global level. Additionally, we will highlight the most recent research related to Chromium(II) iodide, with the goal of providing an up-to-date view of this constantly evolving topic.

Chromium(II) iodide
Names
Other names
chromous iodide
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/Cr.2HI/h;2*1H/q+2;;/p-2
    Key: BMSDTRMGXCBBBH-UHFFFAOYSA-L
  • ..
Properties
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 , 100 kPa).

Chromium(II) iodide is the inorganic compound with the formula CrI2. It is a red-brown[1] 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.[1][2][3]

Treatment of chromium powder with concentrated hydroiodic acid gives a blue hydrated chromium(II) iodide, which can be converted to related acetonitrile complexes.[4]

Cr + n H2O + 2 HI → CrI2(H2O)n + H2

References

  1. ^ a b Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. pp. 1019–1022. ISBN 978-0-08-037941-8.
  2. ^ Tracy, J. W.; Gregory, N. W.; Stewart, J. M.; Lingafelter, E. C. (1962). "The Crystal Structure of Chromium(II) Iodide". Acta Crystallographica. 15 (5): 460–463. doi:10.1107/S0365110X62001152.
  3. ^ Vest, Brian; Hermann, Andreas; Boyd, Peter D. W.; Schwerdtfeger, Peter (2010). "Nucleation of Antiferromagnetically Coupled Chromium Dihalides: From Small Clusters to the Solid State". Inorganic Chemistry. 49 (7): 3169–3182. doi:10.1021/ic901949a.
  4. ^ Holah, David G.; Fackler, John P. (1967). "Chromium(II) Salts and Complexes". Inorganic Syntheses: 26–35. doi:10.1002/9780470132418.ch4.