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(C) In structure $II$,the nitrogen atom is bonded to the ring with a double bond and also has three hydrogen atoms attached to it ($NH_3$ group). This

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$II$ is not an acceptable canonical structure because nitrogen has $10$ valence electrons.

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(C) In structure $II$,the nitrogen atom is bonded to the ring with a double bond and also has three hydrogen atoms attached to it ($NH_3$ group). This means the nitrogen atom is forming $5$ bonds in total ($2$ with the ring carbon and $3$ with hydrogen atoms). Since each bond consists of $2$ electrons,this would imply that the nitrogen atom has $10$ valence electrons $(5 	imes 2 = 10)$. According to the octet rule,nitrogen can have a maximum of $8$ valence electrons. Therefore,structure $II$ is not an acceptable canonical structure because it violates the octet rule for nitrogen.

Select the correct statement for the given structures of anilinium ion:

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