Write the mechanism of the following reaction:
$n B u B r + K C N E t O H - H_{2} O - ------ \to n B u C N$

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Solution

This is an example of bimolecular nucleophilic substitution reaction $S_{N} 2$ . Cyanide ion acts as a nucleophile and bromide ion acts as leaving group. It is one step reaction and the mechanism is as shown above.

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Similar questions

Write the mechanism of the following reaction.

$n B u B r + K C N E i O H - H_{2} O - ------ \to n B u C N$

Write the resonating structures of KCN.

Due to the presence of polar solvent, find the possiblity, which product will be formed preferentially ?

C H_{3} C H_{2} O H H B r - -- \to C H_{3} C H_{2} B r + H_{2} O

C H_{2} = C H_{2} H_{3} O^{+} - -- \to C H_{3} - C H_{2}^{+} + H_{2} O

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