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CBSE Class 11-science Answered

Kolbe's Electrolytic method..
Asked by sc.sallan | 26 Nov, 2009, 08:05: PM
answered-by-expert Expert Answer

Free radical mechanism has been proposed for Kolbe’s reaction.  For example by, Kolbe’s electrolytic method, electrolysis of aqueous solution of potassium acetate gives ethane. At anode acetate ion forms acetate free radical. This free radical undergoes decarboxylation to form methyl free radical. This methyl free radical then dimerises to form ethane. Methane cannot be prepared by this method because the alkane formed in this reaction, is formed by combination of two alkyl free radicals. Therefore it would contain at least two carbon atoms. Thus alkane with even number of carbon atoms would only be formed.

Answered by | 27 Nov, 2009, 04:20: PM

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