Which of the following compounds does not sho | vedclass

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(C) Resonance requires the presence of a conjugated system,such as a double bond adjacent to a positive charge,a lone pair,or another double bond. $A$

Vedclass · Accepted Answer

Anilinium ion $(C_6H_5NH_3^+)$

Vedclass · Answer

(C) Resonance requires the presence of a conjugated system,such as a double bond adjacent to a positive charge,a lone pair,or another double bond. $A$. Benzyl carbocation $(C_6H_5CH_2^+)$ shows resonance as the positive charge is in conjugation with the benzene ring. $B$. $CH_2 = CH - CH = CH - CH_2^+$ shows resonance due to the extended conjugation of $\pi$ electrons. $C$. Anilinium ion $(C_6H_5NH_3^+)$ does not show resonance because the nitrogen atom in the $-NH_3^+$ group has no lone pair of electrons to participate in conjugation,and the positive charge on nitrogen cannot be delocalized into the ring without violating the octet rule for nitrogen. $D$. Tropylium cation $(C_7H_7^+)$ is an aromatic system and shows resonance. Therefore,the correct option is $C$.

Which of the following compounds does not show resonance?

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