Explain why the following systems are not aro | vedclass

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(N/A) $(i)$ For the given compound,the number of $\pi$-electrons is $6$.By Huckel's rule,$4n+2=6$,$4n=4$,$n=1$. Since '$n$' is an integer,the compound

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(N/A) $(i)$ For the given compound,the number of $\pi$-electrons is $6$.
By Huckel's rule,$4n+2=6$,$4n=4$,$n=1$. Since '$n$' is an integer,the compound is aromatic.
$(ii)$ For the given compound,the number of $\pi$-electrons is $4$.
By Huckel's rule,$4n+2=4$,$4n=2$,$n=0.5$. Since '$n$' is not an integer,the compound is not aromatic.
$(iii)$ For the given compound,the number of $\pi$-electrons is $8$.
By Huckel's rule,$4n+2=8$,$4n=6$,$n=1.5$. Since '$n$' is not an integer,the compound is not aromatic.

Explain why the following systems are not aromatic?

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