Sodium aluminum hydride
|Surname||Sodium aluminum hydride|
|Molecular formula||NaAlH 4|
|External identifiers / databases|
|Molar mass||54.00 g mol −1|
1.27 g cm −3
183 ° C (decomposition)
|As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .|
Extraction and presentation
Sodium aluminum hydride can be obtained directly from the elements. The reaction has a very high yield if it is carried out at a temperature of 140 ° C. and a pressure of 350 bar in toluene with triethylaluminum as a catalyst .
It can also be made by reacting sodium hydride with aluminum chloride in tetrahydrofuran . In the reaction, triethylaluminum is used as a catalyst, which serves to form a soluble intermediate product.
Later they improved the structure by making it with aluminum hydride and sodium hydride in tetrahydrofuran.
It is also possible to display it by reacting lithium aluminum hydride or sodium tetrachloroaluminate with sodium hydride.
Sodium aluminum hydride is a white crystalline solid that reacts violently with water. It decomposes when heated, producing hydrogen , among other things . Like lithium aluminum hydride, it is an effective reducing agent, reducing, among other things, carboxylic acid esters to aldehydes and lactones to hydroxyaldehydes .
It is also being studied as a storage medium for hydrogen in the vehicle industry.
There is a risk of explosion in contact with water and halogenated hydrocarbons .
- Entry on sodium aluminum hydride. In: Römpp Online . Georg Thieme Verlag, accessed on January 26, 2015.
- H.J. Emeléus & AG Sharpe: ADVANCES IN INORGANIC CHEMISTRY AND RADIOCHEMISTRY . Academic Press, 1966, ISBN 978-0-08-057857-6 , pp. 319 ( limited preview in Google Book search).
- Entry on sodium aluminum hydride in the Hazardous Substances Data Bank , accessed January 26, 2015.
- Sven Geitmann: Energiewende 3.0: with hydrogen and fuel cells . Hydrogeit Verlag, 2012, ISBN 978-3-937863-16-0 , p. 105 ( limited preview in Google Book search).
- Vitalie Stavila, Raghunandan K. Bhakta, Todd M. Alam, Eric H. Majzoub, Mark D. Allendorf: Reversible Hydrogen Storage by NaAlH Confined within a Titanium-Functionalized MOF-74 (Mg) Nanoreactor. In: ACS Nano . 6, 2012, pp. 9807-9817, doi : 10.1021 / nn304514c .