Write the major product of the following reaction.
$C H_{3} - C l + K C N \to ?$

Methylcyanide

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Methylisocyanide

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Ethane

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None of the above

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Solution

The correct option is A Methylcyanide
Cyanide ion $(C N^{-})$ is the ambident nucleophile and can form different product with same substrate.
$C H_{3} - C l + K C N \to C H_{3} C N + C H_{3} + N \equiv C^{-} + K C l Methylcyanide Methylisocyanide Major Minor$
Here, KCN is predominantly ionic and exist as free ions in solution. C site is more nucleophilic than N site and available to attack the methyl chloride. Hence, the major product will be methyl cyanide

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