Samarium(III) iodide
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| Other names
Triiodosamarium, Samarium triiodide
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3D model (JSmol)
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| ECHA InfoCard | 100.034.048 |
PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| SmI 3 | |
| Molar mass | 531.1 |
| Appearance | orange-yellow crystals |
| Melting point | 850 °C (1,560 °F; 1,120 K) |
| decomposes in water | |
| Hazards | |
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Related compounds
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Samarium(II) iodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Samarium(III) iodide is an inorganic compound, a salt of samarium and hydroiodic acid with the chemical formula SmI
3.[1][2]
Synthesis
Samarium(III) iodide is prepared by the reaction of metallic samarium and iodine:[3]
Properties
Samarium(III) iodide is a yellow powder that is unstable in air and decomposes in water (hydrolysis).[1] When heated with metallic samarium, it forms samarium diiodide:[4]
![{\displaystyle {\ce {2SmI3 + Sm ->[\Delta] 3SmI2}](https://wikimedia.org/api/rest_v1/media/math/render/svg/0556231d1ae5a7c3fc7b62195134e24e1f057661)
Reduction by hydrogen also affords samarium diiodide:
![{\displaystyle {\ce {2SmI3 + H2 ->[\Delta] 2SmI2 + 2HI}](https://wikimedia.org/api/rest_v1/media/math/render/svg/b837e848fb2bccb60f76f74f11d144b5a1802589)
Applications
The compound is commercially available and used in organic reactions as a catalyst.[1]
References
- ^ a b c Zhang, Yuanmin (6 November 2011). "Samarium Triiodide". Synlett. 2011 (11): 1638–1639. doi:10.1055/s-0030-1260781.
- ^ "Samarium(III) Iodide". American Elements. American Elements. Retrieved 8 August 2021.
- ^ Molodkin, A. K.; Karagodina, A. M.; Tupolev, V. S.; Dudareva, A. G.; Prokhina, A. G. (1984). "Iodination of samarium and reaction of samarium triiodide with lithium iodide". Zhurnal Neorganicheskoj Khimii (in Russian). 29 (4): 1069–1072. ISSN 0044-457X. Retrieved 8 August 2021.
- ^ Imamoto, Tsuneo; Ono, Mitsumasa (5 March 1987). "The Reaction of Samarium(III) Iodide with Samarium Metal in Tetrahydrofuran, A New Method for the Preparation of Samarium(II) Iodide". Chemistry Letters. 16 (3): 501–502. doi:10.1246/cl.1987.501. ISSN 0366-7022.