Lithium carbide

• Lithium acetylide
• Dilithium acetylide
• Lithiumethindiid

Translucent, white to gray crystalline solid

Fixed

1.3 g · cm -3

Decomposition

Insoluble in organic solvents

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Lithium carbide is a chemical compound selected from the group of carbides.

Production and representation

Lithium carbide may be obtained by reaction of lithium with the carbon.

At higher pressures, forms instead of lithium carbide ( Li2C2 ) LIC2 or LIC4.

When heated lithium in an electric furnace with an excess of carbon, as is also produced lithium carbide.

In diethyl ether lithium carbide can be prepared by the reaction of 1,2- dichloroethane with phenyllithium, with a thick, colorless precipitate of lithium carbide and monolithium arises.

Properties

Physical Properties

Lithium carbide is a crystalline solid which is an orthorhombic crystal system with space group and the lattice parameters a = 365.5 pm, b = 544.0 pm and c = 483.3 pm has. It is isotypic with Rubidiumperoxid ( Rb2O2 ) and Cäsiumperoxid ( Cs2O2 ).

The standard enthalpy of -59.5 kJ / mol.

Chemical Properties

Lithium carbide reacts with water to form acetylene.

In the molten potassium hydroxide to lithium carbide decomposes also, where it is attacked by concentrated acids slowly.