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Subject - Organic Chemistry

A carbanion is an anion with a negative charge (a lone electron pair) at the carbon atom.

Carbanions are generated by deprotonation of C-H compounds with strong bases. In compounds with alkali metal-carbon bonds, e.g. butyllithium, these bonds have partly covalent and partly ionic character. Because of the pronounced ionic portion of the bond, the organic parts of these compounds are also considered carbanions.