Sun January 27, 2013 By:

sir i have a doubt. In kolbes electrolytic method for preparing alkanes, why cant we prepare any alkane with odd no of C atoms, say, methane?

Expert Reply
Mon January 28, 2013
It is the electrolysis of an aqueous solution of sodium or potassium salt of a carboxylic acid gives alkane (containing even number of carbon atoms) at the anode.
This method is useful for the preparation of ethane and higher members of the alkane series. Methane cannot be prepared by this method as the alkane is formed by the combination of two alkyl free radicals. So, the alkane formed would contain at least two carbon atoms.
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