Difference between revisions of "Sodium aluminium hydride"
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Sodium aluminium hydride is
Sodium aluminium hydride is white solid, which reacts with water, but is soluble in [[tetrahydrofuran|THF]].
Revision as of 20:18, 12 August 2019
| IUPAC name
Sodium aluminium hydride
| Other names
Aluminum sodium hydride
|Molar mass||54.003 g/mol|
|Appearance||White crystalline solid|
|Melting point||183 °C (361 °F; 456 K) (decomposes)|
|Solubility|| Reacts with alcohols, carboxylic acids, halocarbons|
Soluble in diglyme
Insoluble in diethyl ether, hydrocarbons
|Solubility in tetrahydrofuran||16 g/100 ml|
|Vapor pressure||~0 mmHg|
Std enthalpy of
|Safety data sheet||Sigma-Aldrich|
|Lithium aluminium hydride|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Sodium aluminium hydride, also known as sodium alanate is an white pyrophoric solid, with the chemical formula NaAlH4, used as a reducing agent in place of lithium aluminium hydride.
Sodium aluminium hydride reacts with water, releasing hydrogen gas.
- NaAlH4 + 4 H2O → NaAl(OH)4 + 4 H2
It is a powerful reducing agent, though lithium aluminium hydride is stronger.
Sodium aluminium hydride is an odorless white solid, which reacts with water, but is soluble in THF.
Sodium aluminium hydride is sold by chemical suppliers, though it's not easy to get hold of.
Sodium aluminium hydride can be synthesized by reacting powdered sodium hydride and aluminium with hydrogen at 200 °C under high pressure (<100 atm). A catalyst, like triethylaluminium is used.
- Reduce organic compounds
- Make lithium aluminium hydride
Sodium aluminium hydride is corrosive, caustic and pyrophoric.
Sodium aluminium hydride is best in air tight containers. Keep it away from moisture and acidic vapors.
Can be safely neutralized by slowly and carefully adding it in large amounts of water or an alcohol. Neutralization should be done outside.