Carbanion
| Formula / Notation | R⁻ (carbanion; carbon bears negative charge) |
|---|---|
| Also Known As | Carbanion intermediate, carbon anion, organometallic carbanion equivalent |
What is Carbanion?
A carbanion is a carbon-containing anion in which the carbon bears a negative charge, meaning it has three bonds and an unshared pair of electrons. Carbanions are important reactive intermediates in organic chemistry, particularly in reactions with alkyl lithium and Grignard reagents. They are strong bases and nucleophiles.
Formula & Notation
Other Names / Synonyms: Carbanion intermediate, carbon anion, organometallic carbanion equivalent
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A carbanion is a carbon-containing anion in which the carbon bears a negative charge, meaning it has three bonds and an unshared pair of electrons. Carbanions are important reactive intermediates in organic chemistry, particularly in reactions with alkyl lithium and Grignard reagents. They are strong bases and nucleophiles.
Carbanions are key intermediates in organic synthesis: aldol condensations, Claisen condensations, Michael additions, and Grignard reactions all proceed via carbanion (or carbanion-equivalent) intermediates. They are exploited in polymer chemistry (anionic polymerisation) and in asymmetric synthesis…
Carbanion-generating reagents (organolithiums, Grignard reagents) are pyrophoric or highly moisture-sensitive. Use strict anhydrous, inert atmosphere (N₂ or Ar) techniques. Organolithiums react violently with water; keep dry solvent and appropriate fire extinguishers nearby.
The formula or notation for Carbanion is: R⁻ (carbanion; carbon bears negative charge)