lsocyanide can treatment with be prepared by alkyl halide on

Options

A. AgCN
B. AgNC
C. KCN
D. None of these

Answer

A

Explanation

`R-X+KCN to underset"Alkyl cyanide""RCN" ` (attack occurs through C)
`R-X+AgCN to underset"Alkyl isocyanide"(R-NC) ` (attack occurs through N )
AgCN is predominantly covalent, therefore, in this case only N-atom is free to donate electron pair.
Thus, the attack mostly occurs through the N-atom of the cyanide group forming alkyl isocyanides. `CN^-` behaves as an ambidentate nucleophile.