joe_aldehyde
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Solvents for LAH reductions?
which solvents except plain ether and THF can be used for LAH reductions? i've searched google and well, there is dioxane on the shelf but
i'm not sure if it can be used. what about aliphatic hydrocarbons?
[Edited on 28-8-2005 by joe_aldehyde]
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solo
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| Quote: |
Solubility of lithium aluminum hydride
The solubility of lithium aluminum hydride in grams per 100g of various ethers at 25°C are as follows: diethyl ether 25-30, tetrahydrofuran 13,
dibutyl ether 2 and dioxane 0.1. Because of the difficulty of handling the extremely viscous solutions obtained in the first two solvents, the data
are of only approximate character.
Reference: J. Am. Chem. Soc. 69, 1199 (1947)
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.........source,
http://www.erowid.org/archive/rhodium/chemistry/lah.synthesi...
It's better to die on your feet, than live on your knees....Emiliano Zapata.
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BromicAcid
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Strictly regarding solubility (From Hawley's Condensed Chemical Dictionary):
| Quote: | | Soluble in diethyl ether, tetrahydrofuran, dimthyl "Cellosolve;" slightly soluble in dibutyl ether; insoluble or very slightly soluble in
hydrocarbons and dioxane. |
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joe_aldehyde
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so i guess for a quick reaction, solubility matters most, right?
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