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Topic summary

Lithium aluminium hydride

Lithium aluminium hydride
Names Preferred IUPAC name
Lithium tetrahydridoaluminate(III)
Systematic IUPAC name
Lithium alumanuide
Other names
  • Lithium aluminium hydride
  • Lithal
  • Lithium alanate
  • Lithium aluminohydride
  • Lithium tetrahydridoaluminate
Identifiers
3D model (JSmol)
Abbreviations LAH ChEBI
ChemSpider
ECHA InfoCard100.037.146EC Number
  • 240-877-9
13167
RTECS number
  • BD0100000
UNII
UN number1410
  • InChI=1S/Al.Li.4H/q-1;+1;;;;
    Key: OCZDCIYGECBNKL-UHFFFAOYSA-N
  • InChI=1S/Al.Li.4H/q-1;+1;;;;
  • Key: OCZDCIYGECBNKL-UHFFFAOYSA-N
  • [Li+].[AlH4-]
  • (H4): [2H][Al-]([2H])([2H])[2H].[Li+]
  • (H4): [3H][Al-]([3H])([3H])[3H].[Li+]
Properties Li[AlH4]Molar mass37.95 g·mol Appearance white crystals (pure samples)
grey powder (commercial material)
Odorodorless Density0.917 g/cm, solid Melting point150 °C (302 °F; 423 K) (decomposes) Reacts Solubility in tetrahydrofuran112.332 g/L Solubility in diethyl ether39.5 g/100 ml Structure monoclinicP21/cThermochemistry 86.4 J/(mol·K) 87.9 J/(mol·K) −117 kJ/mol −48.4 kJ/mol Hazards GHS labelling: DangerH260, H314P223, P231+P232, P280, P305+P351+P338, P370+P378, P422NFPA 704 (fire diamond)
3
2
2
W
Flash point125 °C (257 °F; 398 K) Safety data sheet (SDS) Lithium aluminium hydrideRelated compounds
Related hydride
aluminium hydride
sodium borohydride
sodium hydride
Sodium aluminium hydride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Lithium aluminium hydride, commonly abbreviated to LAH, is an inorganic compound with the chemical formulaLi[AlH4] or LiAlH4. It is a white solid, discovered by Finholt, Bond and Schlesinger in 1947. This compound is used as a reducing agent in organic synthesis, especially for the reduction of esters, carboxylic acids, and amides. The solid is dangerously reactive toward water, releasing gaseous hydrogen (H2). Some related derivatives were once discussed for hydrogen storage.

Wikipedia source