Lithium borohydride

• Lithium borohydride
• Lithium tetrahydroborate
• Lithiumtetrahydridoborat

Hygroscopic, white to gray solid

Fixed

0.6660 g · cm -3

280 ° C

• Decomposes in water ( 209 g · l-1 at 10 ° C)
• Soluble in ether ( 2.5 g · l-1 at 19 ° C )

Risk

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Lithium is a chemical compound from the group of lithium compounds and boranes.

Production and representation

Lithium borohydride may be produced by a metathesis reaction of sodium borohydride, and lithium bromide.

The direct formation of metallic lithium, boron and hydrogen is possible in principle, but requires extreme conditions (150 at hydrogen pressure, 650 ° C).

Also the production of ( intermediate ) diborane ( for example lithium hydride with boron trifluoride in diethyl ether) is possible.

Properties

Lithium borohydride is a flammable, hygroscopic, white to gray solid. It decomposes on contact with water or damp air, forming hydrogen.

Use

Lithium borohydride is used as reducing agents for aldehydes, ketones, lactones, esters, epoxides and organic chemistry.