Samarium(II) Iodide CAS 32248-43-4

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  • Appearance: White powder
  • Assay: 99. 0%min
  • Stock: In stock
  • Sample: Available
  • Zhishang Chemical: Samarium(II) Iodide Supplier & Manufacturer

Basic Info

What is Samarium(II) Iodide?

Samarium iodide is a samarium iodide, which is blue-dark blue liquid with a special odor and has a certain solubility in polar organic solvents, usually used in THF, HMPA.

Samarium diiodide can be obtained by pyrolysis of samarium triiodide and the reaction of samarium powder with 1,2-diiodoethane or diiodomethane in anhydrous tetrahydrofuran.

Samarium iodide (SmI2) is a widely used reagent in organic synthesis. The main reactions it participates in include: free radical cyclization reaction; carbonyl-alkene coupling reaction; pina coupling reaction; aldol condensation reaction; Barbier reaction; Reformatsky reaction, etc.

Ketones or esters react with iodohydrocarbons to form tertiary alcohols (Barbier reaction), similar to the Grignard reaction, to form new carbon-carbon bonds. The reaction is very fast, and a solution of samarium diiodide in tetrahydrofuran is often used, and a catalytic amount of nickel iodide is added.
RI + R’COR” → R(R’)C(OH)R”

Samarium(II) Iodide Uses

  1. In organic synthesis and also electron transfer responses; in discharge lights.
  2. Reaction accelerators involved in the cyclization of samarium carboxyaryl groups.
  3. Samarium iodide is a single electron transfer reagent used as a reducing agent in synthetic chemistry. Samarium iodide is also used to facilitate intramolecular reductive coupling reactions, resulting in cyclized compounds.

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Application of Samarium(II) Iodide

Samarium (II) iodide solution (SmI 2) can be used as a reagent to synthesize the following substances:

  • Cycles of indole derivatives induced by SmI 2, benzoylated pyrrolizidine and indolizidine.
  • Chiral 4-substituted 2-oxazolidinones and 5,5-disubstituted oxazolidinones via asymmetric Reformatsky type reactions.
  • γ- Aminoalkyl substituted by keto olefin coupling reaction γ- Butyrolactone.

It can also be used to:

  • Conjugated double and triple bonds were reduced to olefins using a SmI 2/H 2 O/amine mixture.
  • By SmI 2/H 2 O/Et 3 N β- Hydroxyl ketones are converted to 1,3-diol.
  • The SmI 2-H 2O reagent system was used to selectively reduce the 6-component lactone to the corresponding diol/triol.

SmI2 is an effective single electron reductant, which can promote the cyclization of ketone olefin, ketone aryl group and pinacol coupling reaction under mild conditions. In general, intramolecular and intermolecular coupling are carried out in a highly stereoselective manner. It is also used to synthesize new hetero coordination aryl samarium oxide/cyclopentadiene complexes.

Preparation and Properties

Samarium iodide can be reacted with samarium oxide and hydroiodic acid, and the nonahydrate (SmI3·9H2O) can be crystallized by evaporating the solvent and drying with calcium chloride. The hydrate and ammonium iodide are heated to obtain anhydrous.

Sm2O3 + 6HI → 2SmI3 + 3H2O

It reacts with metallic samarium in tetrahydrofuran to give samarium iodide:

2 SmI3 + Sm → 3SmI2

It reacts with SmOI, NaI and Na in a tantalum container to obtain Sm4OI6.


  1. Samarium(II) iodide – WikiPedia
  2. Samarium diiodide – PubChem
  3. Molander, G. A. Chem. Rev., 1992, 92, 29. (2) Molander, G. A.; Harris, C. R. Chem. Rev., 1996, 96, 307.

Samarium(II) Iodide Suppliers and Manufacturers

As a samarium iodide supplier and manufacturer with strict standard product quality system certificate, Zhishang Chemical has long been providing the best samarium iodide raw materials to customers all over the world.

Over the years, relying on professional team experience and customer-centric team concept to meet customer needs in a timely manner, our company enjoys a high reputation in the world. At present, our company has served more than 6,000 customers and has established long-term cooperative relations with customers from many countries.

If you have demand for samarium iodide and related products, please contact our service staff Zhishang Chemical – White directly, we will provide you with high-quality products at the best price.

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