Aromatic nitriles `(ArCN)` are not prepared by reaction .

Options

A. `ArX + KCN`
B. `ArN_(2)^(+) + CuCN`
C. `ArCONH_(2) + P_(2)O_(5)`
D. `ArCONH_(2) + SOCl_(2)`

Answer

A

Explanation

Halogen have –I and +M effect by which its electron delocalized in benzene ring by resonance & due to its –I effect, it is bonded with benzene ring and cannot be substituted by`CN^(-)` & show the inertness against KCN while other option gives Aromatic nitrile
`ArN_(2)^(+) + CuCN rarr ArCN + N_(2)+ Cu^(+)`
`ArCONH_(2) underset(-H_(2)O)overset(P_(2)O_(5))rarr ArCN`
`ArCONH_(2) + SOCl_(2) rarr ArCN + SO_(2) + 2HCl`