Which of the following compounds is anti-arom | vedclass

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(D) Anti-aromatic compounds are cyclic,planar,fully conjugated,and contain $4n$ $\pi$-electrons (where $n = 1, 2, ...$).$(I)$ Furan: $6$ $\pi$-electro

Vedclass · Accepted Answer

$V$ and $VI$

Vedclass · Answer

(D) Anti-aromatic compounds are cyclic,planar,fully conjugated,and contain $4n$ $\pi$-electrons (where $n = 1, 2, ...$).$(I)$ Furan: $6$ $\pi$-electrons (aromatic).$(II)$ Cycloheptatriene: Non-planar (non-aromatic).$(III)$ Cyclooctatetraene: Non-planar tub-shaped (non-aromatic).$(IV)$ Cyclopentadienyl anion: $6$ $\pi$-electrons (aromatic).$(V)$ Cyclopentadienyl cation: $4$ $\pi$-electrons,cyclic,planar,conjugated (anti-aromatic).$(VI)$ Cyclobutadiene: $4$ $\pi$-electrons,cyclic,planar,conjugated (anti-aromatic).Thus,compounds $(V)$ and $(VI)$ are anti-aromatic.

Column $-I$	Column $-II$
$(i)$ $C_6H_5NH_2$	$(p)$ $-R$ effect
$(ii)$ $C_6H_5OH$	$(q)$ $+R$ effect
$(iii)$ $C_6H_5NO_2$	$(r)$ $+I$ effect
$(iv)$ $CH_3CH_2Cl$	$(s)$ $-I$ effect

Which of the following compounds is anti-aromatic?

Similar Questions

Which of the following has a hyperconjugation effect?

Rank the hydrogen atoms $(H_a, H_b, H_c)$ in the following molecule according to their acidic strengths.

In which of the following compounds is the hyperconjugation effect not present?

Which acid of each pair shown here would you expect to be stronger?
$(i)$ $CH_3CO_2H$ or $CH_2FCO_2H$
$(ii)$ $CH_2FCO_2H$ or $CH_2ClCO_2H$
$(iii)$ $CH_2FCH_2CH_2CO_2H$ or $CH_3CHFCH_2CO_2H$
$(iv)$ $F_3C-C_6H_4-COOH$ or $H_3C-C_6H_4-COOH$

Match column $-I$ and column $-II$ with the correct electronic effect relation:

Column $-I$ Column $-II$

$(i)$ $C_6H_5NH_2$ $(p)$ $-R$ effect

$(ii)$ $C_6H_5OH$ $(q)$ $+R$ effect

$(iii)$ $C_6H_5NO_2$ $(r)$ $+I$ effect

$(iv)$ $CH_3CH_2Cl$ $(s)$ $-I$ effect

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