Molybdenum(III) bromide
Chemical compound
From Wikipedia, the free encyclopedia
Molybdenum(III) bromide is the inorganic compound with the formula MoBr3. It is a black solid that is insoluble in most solvents but dissolves in donor solvents such as pyridine.
| |
 | |
| Names | |
|---|---|
| IUPAC name
Molybdenum(III) bromide | |
| Other names
Molybdenum tribromide | |
| Identifiers | |
3D model (JSmol) |
|
| ChemSpider | |
| ECHA InfoCard | 100.033.259 |
| EC Number |
|
PubChem CID |
|
CompTox Dashboard (EPA) |
|
| |
| |
| Properties | |
| MoBr3 | |
| Molar mass | 335.70 g/mol |
| Appearance | dark green to black solid |
| Density | 4.89 g/cm3 |
| Melting point | 500 °C (932 °F; 773 K) (decomposes) |
| insoluble | |
| Solubility | soluble in pyridine |
| +525.0·10−6 cm3/mol | |
| Related compounds | |
Other anions |
Molybdenum(III) chloride Molybdenum(III) iodide |
Related compounds |
Molybdenum(II) bromide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Preparation
Molybdenum(III) bromide is produced by the reaction of elemental molybdenum and bromine at 350 °C (662 °F).[1]
It can also be prepared from the reduction of molybdenum(IV) bromide with molybdenum metal, hydrogen gas, or a hydrocarbon.[2]
It has a structure consisting of infinite chains of face-sharing octahedra with alternatingly short and long Mo-Mo contacts. The same structure is adopted by the tribromides of ruthenium and technetium.[3][4] In contrast, in the high temperature phase of titanium(III) iodide, the Ti---Ti separation is invariant.