dilithium acetylide
dilithium acetylide Basic information
- Product Name:
- dilithium acetylide
- Synonyms:
-
- dilithium acetylide
- lithium carbide
- 1,2-Dilithioacetylene
- Dilithioacetylene
- Ethyne-1,2-diylbislithium
- Ethynylenebislithium
- CAS:
- 1070-75-3
- MF:
- C2Li2
- MW:
- 37.9034
- EINECS:
- 213-980-1
- Mol File:
- 1070-75-3.mol
More
Less
dilithium acetylide Chemical Properties
- Density
- 1.650
- solubility
- reacts with H2O; insoluble in organic solvents
- color
- white hygroscopic crystals, crystalline
More
Less
dilithium acetylide Usage And Synthesis
Chemical Properties
crystal(s) white powder(s); decomposes in water, evolves acetylene when dissolved in acid [HAW93]
Preparation
Lithium carbide, Li2C2, may be prepared by the direct combination of lithium and carbon at about 1000°C or by the reaction of lithium metal with acetylene in liquid ammonia. The latter process first yields lithium acetylide, LiC=CH, which decomposes to lithium carbide. The conversion to the carbide is incomplete, however . A convenient laboratory preparation of lithium carbide may be carried out by bubbling acetylene into a solution of n-butyllithium in hexane. The precipitated carbide may be filtered from the reaction mixture, washed, and dried. Lithium carbide is ionic and yields acetylene on hydrolysis.