Samarium(III) iodide

Last updated
Samarium(III) iodide
Names
Other names
Triiodosamarium, Samarium triiodide
Identifiers
3D model (JSmol)
ECHA InfoCard 100.034.048 OOjs UI icon edit-ltr-progressive.svg
PubChem CID
  • InChI=1S/3HI.Sm/h3*1H;/q;;;+3/p-3
    Key: XQKBFQXWZCFNFF-UHFFFAOYSA-K
  • I[Sm](I)I
Properties
SmI
3
Molar mass 531.1
Appearanceorange-yellow crystals
Melting point 850 °C (1,560 °F; 1,120 K)
decomposes in water
Hazards
GHS labelling:
Danger
Related compounds
Related compounds
 Samarium(II) iodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Samarium(III) iodide is an inorganic compound, a salt of samarium and hydroiodic acid with the chemical formula SmI
3. [1] [2]

Contents

Synthesis

Samarium(III) iodide is prepared by the reaction of metallic samarium and iodine: [3]

2 Sm + 3 I2 → 2 SmI3

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]

2SmI3 + Sm → 3 SmI2

Reduction by hydrogen also affords samarium diiodide upon heating:

2 SmI3 + H2 → 2 SmI2 + 2 HI

Applications

The compound is commercially available and used in organic reactions as a catalyst. [1]

Related Research Articles

<span class="mw-page-title-main">Samarium(II) iodide</span> Chemical compound

Samarium(II) iodide is an inorganic compound with the formula SmI2. When employed as a solution for organic synthesis, it is known as Kagan's reagent. SmI2 is a green solid and forms a dark blue solution in THF. It is a strong one-electron reducing agent that is used in organic synthesis.

<span class="mw-page-title-main">Triiodide</span> Ion

In chemistry, triiodide usually refers to the triiodide ion, I−
3. This anion, one of the polyhalogen ions, is composed of three iodine atoms. It is formed by combining aqueous solutions of iodide salts and iodine. Some salts of the anion have been isolated, including thallium(I) triiodide (Tl+[I3]−) and ammonium triiodide ([NH4]+[I3]−). Triiodide is observed to be a red colour in solution.

Terbium(III) iodide (TbI3) is an inorganic chemical compound.

<span class="mw-page-title-main">Thallium triiodide</span> Chemical compound

Thallium triiodide is a chemical compound of thallium and iodine with formula TlI3. Unlike the other thallium trihalides, which contain thallium(III), TlI3 is a thallium(I) salt and contains the triiodide ion, I−
3.

<span class="mw-page-title-main">Reductions with samarium(II) iodide</span>

Reductions with samarium(II) iodide involve the conversion of various classes of organic compounds into reduced products through the action of samarium(II) iodide, a mild one-electron reducing agent.

Samarium iodide may refer to:

<span class="mw-page-title-main">Molybdenum(III) iodide</span> Chemical compound

Molybdenum(III) iodide is the inorganic compound with the formula MoI3.

<span class="mw-page-title-main">Chromium(III) iodide</span> Chemical compound

Chromium(III) iodide, also known as chromium triiodide, is an inorganic compound with the formula CrI3. It is a black solid that is used to prepare other chromium iodides.

<span class="mw-page-title-main">Scandium triiodide</span> Chemical compound

Scandium triiodide, also known as scandium iodide, is an inorganic compound with the formula ScI3 and is classified as a lanthanide iodide. This salt is a yellowish powder. It is used in metal halide lamps together with similar compounds, such as caesium iodide, because of their ability to maximize emission of UV and to prolong bulb life. The maximized UV emission can be tuned to a range that can initiate photopolymerizations.

Iron(III) iodide is an inorganic compound with the chemical formula FeI3. It is a thermodynamically unstable compound that is difficult to prepare. Nevertheless, iron(III) iodide has been synthesised in small quantities in the absence of air and water.

Neodymium(III) iodide is an inorganic salt of iodine and neodymium with the formula NdI3. Neodymium uses the +3 oxidation state in the compound. The anhydrous compound is a green powdery solid at room temperature.

<span class="mw-page-title-main">Neodymium(II) iodide</span> Chemical compound

Neodymium(II) iodide or neodymium diiodide is an inorganic salt of iodine and neodymium the formula NdI2. Neodymium uses the +2 oxidation state in the compound.

<span class="mw-page-title-main">Praseodymium(III) iodide</span> Chemical compound

Praseodymium(III) iodide is an inorganic salt, consisting of the rare-earth metal praseodymium and iodine, with the chemical formula PrI3. It forms green crystals. It is soluble in water.

<span class="mw-page-title-main">Praseodymium diiodide</span> Chemical compound

Praseodymium diiodide is a chemical compound with the empirical formula of PrI2, consisting of praseodymium and iodine. It is an electride, with the ionic formula of Pr3+(I−)2e−, and therefore not a true praseodymium(II) compound.

<span class="mw-page-title-main">Lanthanum(III) iodide</span> Chemical compound

Lanthanum(III) iodide is an inorganic compound containing lanthanum and iodine with the chemical formula LaI
3.

Europium(III) iodide is an inorganic compound containing europium and iodine with the chemical formula EuI3.

<span class="mw-page-title-main">Lutetium(III) iodide</span> Chemical compound

Lutetium(III) iodide or lutetium iodide is an inorganic compound consisting of iodine and lutetium, with the chemical formula of LuI3.

<span class="mw-page-title-main">Holmium(III) iodide</span> Chemical compound

Holmium(III) iodide is an iodide of holmium, with the chemical formula of HoI3. It is used as a component of metal halide lamps.

Samarium compounds are compounds formed by the lanthanide metal samarium (Sm). In these compounds, samarium generally exhibits the +3 oxidation state, such as SmCl3, Sm(NO3)3 and Sm(C2O4)3. Compounds with samarium in the +2 oxidation state are also known, for example SmI2.

<span class="mw-page-title-main">Thorium diiodide</span> Chemical compound

Thorium diiodide is an iodide of thorium, with the chemical formula of ThI2. It is an electride with the ionic formula Th4+(I−)2e−2. It is air-sensitive.

References

  1. 1 2 3 Zhang, Yuanmin (6 November 2011). "Samarium Triiodide". Synlett . 2011 (11): 1638–1639. doi: 10.1055/s-0030-1260781 .
  2. ↑ "Samarium(III) Iodide". American Elements. American Elements . Retrieved 8 August 2021.
  3. ↑ 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.
  4. ↑ 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.
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