Beryllium iodide

Beryllium iodide
Template:Longitem	Template:Unbulleted list
ChEBI	Template:Unbulleted list
ChemSpider	Template:Unbulleted list
DrugBank	Template:Unbulleted list
EC Number	Template:Unbulleted list
KEGG	Template:Unbulleted list
Template:Longitem	Template:Unbulleted list
RTECS number	Template:Unbulleted list
	Script error: No such module "collapsible list".
	Script error: No such module "collapsible list".
Template:Longitem	Template:Chembox Elements/molecular formula
Molar mass	Template:Chem molar mass
Appearance	colorless needle-like crystals
Density	4.325 g/cm3
Melting point	Template:Chembox CalcTemperatures
Boiling point	Template:Chembox CalcTemperatures
Solubility	Slightly soluble in [[carbon disulfide\|Template:Chem2]]; Soluble in ethanol, diethyl ether
Template:Longitem	orthorhombic
Template:Longitem	71.14 J/(mol·K)
Template:Longitem	130 J/(mol·K)
Template:Longitem	−192.62 kJ/mol
Template:Longitem	19 kJ/mol
NFPA 704 (fire diamond)	Template:NFPA 704 diamond
Template:Longitem	Template:Ubl
Template:Longitem	Template:Ubl
Template:Longitem	Template:Ubl

Template:Chembox image cell Template:Chembox image cell Template:Chembox image cell Template:Chembox AllOtherNames Template:Chembox headerbar Template:Chembox Indexlist Template:Chembox Jmol Template:Chembox ChEMBL Template:Chembox ECHA Template:Chembox E number Template:Chembox IUPHAR ligand Template:Chembox UNII Template:Chembox CompTox Template:Chembox headerbar Template:Chembox SolubilityInWater Template:Chembox headerbar Template:Chembox headerbar Template:Chembox DeltaGfree Template:Chembox headerbar Template:Chembox OHS (set)Template:Chembox setHeader Template:Chembox setDatarow Template:Chembox setDatarow Template:Chembox setDatarow Template:Chembox headerbar Template:Chembox Datapage check Template:Chembox Footer

Template:Chembox Footer/trackingScript error: No such module "TemplatePar".Template:Short description

Beryllium iodide is an inorganic compound with the chemical formula Template:Chem2. It is a hygroscopic white solid. The Template:Chem2 cation, which is relevant to salt-like BeI₂, is characterized by the highest known charge density (Z/r = 6.45), making it one of the hardest cations and a very strong Lewis acid.^[4]

Reactions

Beryllium iodide can be prepared by reacting beryllium metal with elemental iodine at temperatures of 500 °C to 700 °C:^[1]

Template:Chem2

When the oxidation is conducted on an ether suspension of elemental Be, one obtains colorless dietherate:^[5]

Template:Chem2

The same dietherate is obtained by suspending beryllium iodide in diethyl ether:^[5]

Template:Chem2

This ether ligands in Template:Chem2 can be displaced by other Lewis bases.

Beryllium iodide reacts with fluorine giving beryllium fluoride and fluorides of iodine, with chlorine giving beryllium chloride, and with bromine giving beryllium bromide.

Structure

Two forms (polymorphs) of Template:Chem2 are known. Both structures consist tetrahedral Template:Chem2 centers interconnected by doubly bridging iodide ligands. One form consist of edge-sharing polytetrahedra. The other form resembles zinc iodide with interconnected adamantane-like cages.^[6]

Applications

Beryllium iodide can be used in the preparation of high-purity beryllium by the decomposition of the compound on a hot tungsten filament.

References

↑ ^a ^b Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
↑ Script error: No such module "citation/CS1".
↑ ^a ^b ^c Script error: No such module "citation/CS1".
↑ Script error: No such module "citation/CS1".
↑ ^a ^b Script error: No such module "Citation/CS1".
↑ Script error: No such module "Citation/CS1".