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 Unit cell of lithium borohydride at room temperature
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| Names | |
|---|---|
| IUPAC name
Lithium tetrahydridoborate(1–)
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| Other names
Lithium hydroborate,
Lithium tetrahydroborate Borate(1-), tetrahydro-, lithium, lithium boranate | |
| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.037.277 |
PubChem CID
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| RTECS number |
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| LiBH4 | |
| Molar mass | 21.784 g/mol |
| Appearance | White solid |
| Density | 0.666 g/cm3[1] |
| Melting point | 268 °C (514 °F; 541 K) |
| Boiling point | 380 °C (716 °F; 653 K) decomposes |
| reacts | |
| Solubility in ether | 2.5 g/100 mL |
| Structure[2] | |
| orthorhombic | |
| Pnma | |
a = 7.17858(4), b = 4.43686(2), c = 6.80321(4)
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Lattice volume (V)
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216.685(3) A3 |
Formula units (Z)
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4 |
| [4]B | |
| Thermochemistry | |
Heat capacity (C)
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82.6 J/(mol⋅K) |
Std molar
entropy (S⦵298) |
75.7 J/(mol⋅K) |
Std enthalpy of
formation (ΔfH⦵298) |
−198.83 kJ/mol |
| Hazards | |
| > 180 °C (356 °F; 453 K) | |
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 borohydride (LiBH4) is a borohydride 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, being a stronger reducing agent and highly soluble in ethers, whilst remaining safer to handle than lithium aluminium hydride.[3]
- ^ Sigma-Aldrich Product Detail Page.
- ^ J-Ph. Soulie, G. Renaudin, R. Cerny, K. Yvon (2002-11-18). "Lithium boro-hydride LiBH4: I. Crystal structure". Journal of Alloys and Compounds. 346 (1–2): 200–205. doi:10.1016/S0925-8388(02)00521-2.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ Luca Banfi, Enrica Narisano, Renata Riva, Ellen W. Baxter, "Lithium Borohydride" e-EROS Encyclopedia of Reagents for Organic Synthesis, 2001, John Wiley & Sons. doi:10.1002/047084289X.rl061.pub2.