In the preparation of a 1^{circ}-amine from a | vedclass

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(C) To prepare a $1^{\circ}$-amine from an alkyl halide with the simultaneous addition of one $-CH_2-$ group to the carbon chain,$KCN$ is used as the

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potassium cyanide,$KCN$

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(C) To prepare a $1^{\circ}$-amine from an alkyl halide with the simultaneous addition of one $-CH_2-$ group to the carbon chain,$KCN$ is used as the reagent. The reaction proceeds as follows: $1$. Nucleophilic substitution: $R-X + KCN \rightarrow R-CN + KX$ $2$. Reduction: $R-CN + 4[H] \rightarrow R-CH_2-NH_2$ $KCN$ provides the cyanide ion $(CN^-)$,which acts as a nucleophile to extend the carbon chain by one carbon atom,and subsequent reduction of the nitrile group yields the $1^{\circ}$-amine.

In the preparation of a $1^{\circ}$-amine from an alkyl halide,with simultaneous addition of one $-CH_2-$ group to the carbon chain,the reagent used as the source of nitrogen is

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