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 resonane `&` due to its -I effect, it is bonded with benzene ring and cannot be subsituted by `CN^(-) &` show the inertness against KCN while other option gives Aromatic nitrile.
`ArN_(2)^(+)+CuCNrarrARCN+N_(2)+Cu^(+)`
`ArCONH_(2)underset(-H_(2)O)overset(P_(2)O_(5))rarrArCN`
`ArCONH_(2)+SOCl_(2)rarrArCN+SO_(2)+2HCl`