Question

Which of the following species does not exert a resonance effect ?

• A. $C_6H_5NH_2$
• B. $C_6H_5NH_3$
• C. $C_6H_5OH$
• D. $C_6H_5Cl$

Answer 1

Answer: (B)

$C_6H_5NH_3$

Answer 2

Among the given species $C _{6} H _{5} \overset{+}{N} H _{3}$ does not exert a resonance effect. Structure $II$ is not possible because in it nitrogen contains 10 valence electrons.