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Chromium(II) iodide

January 13, 2023

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 iodiide ligands. Reflecting the effects of its d4 configuration, chromium's coordination sphere is highly distorted.[1][2][3]

Chromium(II) iodide
Names
Other names
chromous iodide
Identifiers
  • 13478-28-9
3D model (JSmol)
  • Interactive image
ChemSpider
  • 13318420
  • 18626753
  • DTXSID20595261
  • InChI=1S/Cr.2HI/h;2*1H/q+2;;/p-2
    Key: BMSDTRMGXCBBBH-UHFFFAOYSA-L
  • [Cr+2].[I-].[I-]
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 [77 °F], 100 kPa).

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.

January 13, 2023
chromium, iodide, inorganic, compound, with, formula, cri2, brown, black, solid, compound, made, thermal, decomposition, chromium, iodide, like, many, metal, diiodides, cri2, adopts, cadmium, iodide, structure, motif, features, sheets, octahedral, centers, int. 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 iodiide ligands Reflecting the effects of its d4 configuration chromium s coordination sphere is highly distorted 1 2 3 Chromium II iodide NamesOther names chromous iodideIdentifiersCAS Number 13478 28 93D model JSmol Interactive imageChemSpider 13318420PubChem CID 18626753CompTox Dashboard EPA DTXSID20595261InChI InChI 1S Cr 2HI h 2 1H q 2 p 2Key BMSDTRMGXCBBBH UHFFFAOYSA LSMILES Cr 2 I I PropertiesChemical formula Cr I 2Molar mass 305 8050 g mol 1Appearance black deliquescent solidDensity 5 196 g cm3Except where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Infobox references 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 H2References Edit 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 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 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 Holah David G Fackler John P 1967 Chromium II Salts and Complexes Inorganic Syntheses 26 35 doi 10 1002 9780470132418 ch4 Retrieved from https en wikipedia org w index php title Chromium II iodide amp oldid 1115062196, wikipedia, wiki, book, books, library,

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