Question

Which of the following will be most stable diazonium salt $R{N}_2^{+}{X}^{-}$?

• A. $C{H}_3{N}_2^{+}{X}^{-}$
• B. $C_6{H}_5{N}_2^{+}{X}^{-}$
• C. $C{H}_{3}C{H}_2{N}_2^{+}{X}^{-}$
• D. $C_6{H}_{5}C{H}_2{N}_2^{+}{X}^{-}$

Answer 1

Answer: (B)

$C_6{H}_5{N}_2^{+}{X}^{-}$

Among the given diazonium salts, benzene diazonium halide $C_6{H}_5{N}_2^{+}{X}^{-}$ is most stable due to conjugation of the $N\equiv N$ triple bond with benzene ring.