Please explain kolbe's electrolytic method

The Kolbe electrolysis or Kolbe reaction is an organic reaction named after Hermann Kolbe.[1][2] The Kolbe reaction is formally a decarboxylative dimerisation of two carboxylic acids (or carboxylate ions) The overall general reactio Electrólisis de Kolbe.png If a mixture of two different carboxylates are used, all combinations of them are generally seen as the organic product structures: 3 R1COO− + 3 R2COO− → R1−R1 + R1−R2 + R2−R2 + 6 CO2 + 6 e− The reaction mechanism involves a two-stage radical process: electrochemical decarboxylation gives a radical intermediate, then two such intermediates combine to form a covalent bond.[3] As an example, electrolysis of acetic acid yields ethane and carbon dioxide: CH3COOH → CH3COO− → CH3COO· → CH3· + CO2 2CH3· → CH3CH3 Another example is the synthesis of 2,7-dimethyl-2,7-dinitrooctane from 4-methyl-4-nitrovaleric acid:[4] Kolbe electrolysis, synthesis of 2,7-Dimethyl-2,7-dinitrooctane