Kolbe Electrolysis
2CH3COO− → C2H6 + 2CO2 + 2e−
Overview
Kolbe electrolysis oxidizes carboxylate anions at the anode, decarboxylating them to form alkyl radicals that dimerize. Two acetate ions lose CO₂ to form two methyl radicals that couple to produce ethane. This is one of the oldest electroorganic reactions, discovered in 1849.
Participants
| Role | Substance | Coefficient | State |
|---|---|---|---|
| Reactant | Acetic Acid CH₃COOH | 2 | (aq) |
| Product | Ethane C₂H₆ | 1 | (g) |
| Product | Carbon Dioxide CO₂ | 2 | (g) |
Everyday Example
The Kolbe reaction demonstrates how electricity can drive chemical reactions, connecting organic chemistry to electrochemistry.
Industrial Importance
Kolbe electrolysis has been used to synthesize long-chain hydrocarbons from fatty acid salts and is being explored for renewable fuel production.
Properties
- Type
- Organic
- Reversible
- No
- Energy
- Endothermic
Related Reactions
Aldol Condensation of Acetaldehyde
Amide Formation (Acetic Acid + Ammonia)
Baeyer-Villiger Oxidation
Beckmann Rearrangement (Cyclohexanone Oxime)
Bromination of Ethylene
Buchwald-Hartwig Amination
Cannizzaro Reaction of Formaldehyde
Catalytic Hydrogenation of Ethylene
Claisen Condensation (Ethyl Acetate)
Condensation Polymerization (Nylon 6,6)
Frequently Asked Questions
What is the equation for Kolbe Electrolysis?
The balanced equation is: 2CH₃COO⁻ → C₂H₆ + 2CO₂ + 2e⁻.
What type of reaction is Kolbe Electrolysis?
Kolbe Electrolysis is a organic reaction.
Is Kolbe Electrolysis exothermic or endothermic?
Kolbe Electrolysis is endothermic (absorbs energy).