CAS number : 16949-15-8
Molecular weight :21.78
Molecular formula/chemical symbol :LiBH4
Description :
Lithium borohydride (LiBH4) is a tetrahydroborate and known in organic synthesis as a reducing agent for esters. Although less common than the related sodium borohydride, the lithium salt offers some advantages of being highly soluble in ethers and being a stronger reducing agent but still safer to handle than lithium aluminium hydride.
Lithium borohydride may be prepared by the metathesis reaction, which occurs upon ball-milling the more commonly available sodium borohydride, and lithium bromide:
NaBH4 + LiBr → NaBr + LiBH4
Jump to: navigation, search
|
Lithium borohydride |
|
|
IUPAC name[hide] Lithium tetrahydridoborate(1–) |
|
|
Other names[hide]
Lithium
hydroborate, |
|
|
Identifiers |
|
|
55732 |
|
|
ED2725000 |
|
|
Jmol-3D images |
|
|
Properties |
|
|
LiBH4 |
|
|
21.784 g/mol |
|
|
Appearance |
White solid |
|
0.666 g/cm3[1] |
|
|
275 °C[1] |
|
|
380 °C (decomp) |
|
|
Solubility in water |
reacts |
|
Solubility in ether |
2.5 g/100 mL |
|
Thermochemistry |
|
|
Std enthalpy of |
-8.759 kJ/g |
|
3.792 J/g K |
|
|
Hazards |
|
|
> 180 °C |
|
|
|
|
USES :
Strong reducing agent capable of reducing the aldehydes, ketones and esters, etc.
Report :
