Which of the following is an aromatic compoun | vedclass

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(A) According to Huckel's rule,for a compound to be aromatic,it must be planar,cyclic,fully conjugated,and contain $(4n + 2)\pi$ electrons,where $n =

Vedclass · Accepted Answer

Cyclopropenyl cation

Vedclass · Answer

(A) According to Huckel's rule,for a compound to be aromatic,it must be planar,cyclic,fully conjugated,and contain $(4n + 2)\pi$ electrons,where $n = 0, 1, 2, ...$.$(A)$ Cyclopropenyl cation has $2\pi$ electrons $(n=0)$,which satisfies the $(4n + 2)\pi$ rule. It is aromatic.$(B)$ Cyclopentadienyl cation has $4\pi$ electrons,which follows the $4n\pi$ rule,making it anti-aromatic.$(C)$ Cyclobutadiene has $4\pi$ electrons,which follows the $4n\pi$ rule,making it anti-aromatic.$(D)$ Cyclopropenyl anion has $4\pi$ electrons,which follows the $4n\pi$ rule,making it anti-aromatic.Therefore,the correct option is $(A)$.

$A$. Acetaldehyde,vinyl alcohol	$1$. Enantiomers
$B$. Eclipsed and staggered ethane	$2$. Tautomers
$C$. $(+)2$-butanol,$(-)2$-butanol	$3$. Chain isomers
$D$. Methyl-$n$-propylamine and diethylamine	$4$. Conformational isomers
	$5$. Metamers

Which of the following is an aromatic compound?

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Match the following:
$A$. Acetaldehyde,vinyl alcohol $1$. Enantiomers
$B$. Eclipsed and staggered ethane $2$. Tautomers
$C$. $(+)2$-butanol,$(-)2$-butanol $3$. Chain isomers
$D$. Methyl-$n$-propylamine and diethylamine $4$. Conformational isomers
$5$. Metamers

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