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| Names | |
|---|---|
| Other names
chromous iodide
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| Identifiers | |
3D model (
JSmol)
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| ChemSpider | |
PubChem
CID
|
|
CompTox Dashboard (
EPA)
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| 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).
| |
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
- ^ 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.
|
| |
| Names | |
|---|---|
| Other names
chromous iodide
| |
| Identifiers | |
3D model (
JSmol)
|
|
| ChemSpider | |
PubChem
CID
|
|
CompTox Dashboard (
EPA)
|
|
| |
| |
| 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).
| |
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
- ^ 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.