1.

Haloakanes react with KCN to form alkyl cyanides as main product while AgCN forms isocyanides as the chief product . Explain .

Answer»

Solution :KCN is mainly ionic compound and provides CYANIDE ions in solution. THOUGH each CARBON and nitrogen carry a lone pair of electrons, the lone pair on carbon is more reactive. The carbonium ion, `R^(+)`, preferentially combines with the carbon ATOM of the cyanide GROUP and forms alkyl cyanide. On the other hand, AgCN is mainly a covalent compound and only nitrogen has the lone pair of electrons. Thus, carbonium ion attacks through nitrogen and there by forms an alkyl isocyanide


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