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).