Magnesium iodide
- Product Name
- Magnesium iodide
- CAS No.
- 14332-62-8
- Chemical Name
- Magnesium iodide
- Synonyms
- iodomagnesium;MAGNESIUM IODIDE;Magnesium(I) iodide;nesium iodide hydrate
- CBNumber
- CB72130906
- Molecular Formula
- MgI2
- Formula Weight
- 278.11
- MOL File
- 14332-62-8.mol
Magnesium iodide Chemical Properties,Usage,Production
Physical properties
MgI2·8H2O is a crystalline powder, white and deliquescent,
discoloring in air; soluble in water, alcohol, and
ether. This salt has been used in medicine. The anhydrous
compound has a molecular weight of 278.1139 g/mol,a melting point of 637°C, a density of 4.43 g/cm3 and
a water solubility of 1480 g/l at 18°C. MgI2 has the
same type of structure (CdI2) as the chloride and bromide
except that the cell parameters differ.
Magnesium iodide is stable at high heat under
a hydrogen atmosphere, but decomposes in air at normal temperatures, turning brown due to the release
of elemental iodine. When heated in air, it decomposes
completely to magnesium oxide, releasing iodine
vapor.
Magnesium iodide is known to form three
hydrates, MgI2·6H2O, MgI2·8H2O and MgI2·10H2O of which the decahydrate is claimed to be the most stable.
Uses
Magnesium iodide has few commercial uses but can be used to prepare many compounds for organic synthesis. Usage of magnesium iodide in the “Baylis– Hillman” reaction (an organic reaction of an aldehyde and an α,β-unsaturated electron-withdrawing group catalyzed by MgI2) tends to give vinyl-specific compounds. Another example of the usage of MgI2 as a catalyst involves the reaction of 2,3,4,6-tetra-O-benzyl-D-gluconolactone or 2,3,4,6-tetra-O-benzyl-D-mannono-lactone with MgI2 in EtOH which afforded the respective C-2 epimer.
Preparation
Magnesium iodide is the name for the chemical compounds with the formulas MgI2 and its various hydrates Mgl2(H20)X. lt has few commercial uses, but can be used to prepare compounds for organic synthesis. Magnesium iodide can be produced from magnesium oxide, magnesium hydroxide, and magnesium carbonate by reaction with hydroiodic acid:
MgO＋ 2HI →MgI2+ H2O
Mg(OH)2+ 2HI → Mgl2+2H2O
MgCO3+2HI →MgI2+ CO2+ H2O
Magnesium iodide Preparation Products And Raw materials
Raw materials
Preparation Products
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