Samarium(III) iodide is an
inorganic compound
In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemist ...
, a salt of
samarium and
hydroiodic acid with the chemical formula .
Synthesis
Samarium(III) iodide is prepared by the reaction of metallic samarium and
iodine
Iodine is a chemical element with the symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a semi-lustrous, non-metallic solid at standard conditions that melts to form a deep violet liquid at , and boils to a vi ...
:
::
2Sm + 3I2 -> 2SmI3
Properties
Samarium(III) iodide is a yellow powder that is unstable in air and decomposes in water (
hydrolysis).
When heated with metallic samarium, it forms
samarium diiodide
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 solutions are green as well. It is a strong one-electron reducing ...
:
::
2SmI3 + Sm ->Delta
Delta commonly refers to:
* Delta (letter) (Δ or δ), a letter of the Greek alphabet
* River delta, at a river mouth
* D (NATO phonetic alphabet: "Delta")
* Delta Air Lines, US
* Delta variant of SARS-CoV-2 that causes COVID-19
Delta may also re ...
3SmI2
Reduction by
hydrogen also affords samarium diiodide:
::
2SmI3 + H2 ->Delta
Delta commonly refers to:
* Delta (letter) (Δ or δ), a letter of the Greek alphabet
* River delta, at a river mouth
* D (NATO phonetic alphabet: "Delta")
* Delta Air Lines, US
* Delta variant of SARS-CoV-2 that causes COVID-19
Delta may also re ...
2SmI2 + 2HI
Applications
The compound is commercially available and used in organic reactions as a
catalyst.
References
{{Lanthanide halides
Samarium compounds
Iodides
Inorganic compounds
Lanthanide halides