SAMARIUM(II) IODIDE Property

Melting point:

526 ±3°

Boiling point:

solid: 1580℃ [CRC10]

Density 

0.922 g/mL at 25 °C

Flash point:

−2 °F

storage temp. 

2-8°C

solubility 

reacts with H2O

form 

powder

color 

Deep blue-green

Sensitive 

Air & Moisture Sensitive

Merck 

14,8349

Exposure limits

ACGIH: TWA 50 ppm; STEL 100 ppm (Skin)
OSHA: TWA 200 ppm(590 mg/m3)
NIOSH: IDLH 2000 ppm; TWA 200 ppm(590 mg/m3); STEL 250 ppm(735 mg/m3)

InChIKey

UAWABSHMGXMCRK-UHFFFAOYSA-L

CAS DataBase Reference

32248-43-4(CAS DataBase Reference)

Safety

Hazard Codes 

F,Xi,Xn

Risk Statements 

11-19-36/37-40

Safety Statements 

16-29-33-36/37-26

RIDADR 

UN 2056 3/PG 2

WGK Germany 

3

F 

1-10

HazardClass 

3

PackingGroup 

II

HS Code 

28276000

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H225Highly Flammable liquid and vapour

H260In contact with water releases flammable gases which may ignite spontaneously

H302Harmful if swallowed

H314Causes severe skin burns and eye damage

H315Causes skin irritation

H318Causes serious eye damage

H319Causes serious eye irritation

H335May cause respiratory irritation

H351Suspected of causing cancer

H371May cause damage to organs

H372Causes damage to organs through prolonged or repeated exposure

H373May cause damage to organs through prolonged or repeated exposure

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P223Keep away from any possible contact with water, because of violent reaction and possible flash fire.

P233Keep container tightly closed.

P240Ground/bond container and receiving equipment.

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P370+P378In case of fire: Use … for extinction.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P403+P235Store in a well-ventilated place. Keep cool.

P405Store locked up.

P501Dispose of contents/container to..…

SAMARIUM(II) IODIDE Chemical Properties,Usage,Production

Reaction

SmI2 has been used extensively in literature due to its large reduction potential. Known as a single-electron transfer reagent.

Mechanism of SmI2-mediated Reactions

Radicals and anions from organohalides

Reduction of halides: iodides > bromides > chloride


reaction carried out at 60 °C

Description

Samarium(II) iodide, SmI2, when employed as a solution for organic synthesis, is known as “Kagan’s reagent.” SmI2 is a green solid and its solutions are green as well. It is a strong one-electron reducing agent that is used in organic synthesis. Solid, solvent-free SmI2 forms by high-temperature decomposition of samarium(III) iodide (SmI3).

Chemical Properties

Deep bleu-green solution

Uses

Samarium(II) iodide solution (SmI₂) can be used as a reagent in the synthesis of:

• Benzannulated pyrrolizidines and indolizidines by SmI₂-induced cyclizations of indole derivatives.
• Chiral 4-substituted 2-oxazolidinones and 5,5-disubstituted oxazolidinones through asymmetric Reformatsky type reaction.
• γ-Aminoalkyl substituted γ-butyrolactones via ketyl-alkene coupling reaction.

• Reduction of conjugated double and triple bonds into alkenes using SmI₂/H₂O/amine mixtures.
• Conversion of β-hydroxyketones into 1,3-diols by SmI₂/H₂O/Et₃N.
• Selective reduction of 6-membered lactones to the corresponding diols/triols using SmI₂-H₂O reagent system.

Uses

In organic synthesis and electron transfer reactions; in discharge lamps.

Purification Methods

A possible impurity is SmI3 from which it is made. If present, grind the solid to a powder and heat it in a stream of pure H2. The temperature (~ 500-600o) should be below the m (~ 628o) of SmI3, since the molten compounds react very slowly. [Wetzel in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II pp 1149, 1150 1965.]