Which of the following is an aromatic compoun | vedclass

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(A) Aromatic compounds must satisfy $H$ückel's rule,which states that a planar,cyclic,conjugated system must have $(4n + 2) \pi$ electrons,where $n$ i

Vedclass · Accepted Answer

Pyridine

Vedclass · Answer

(A) Aromatic compounds must satisfy $H$ückel's rule,which states that a planar,cyclic,conjugated system must have $(4n + 2) \pi$ electrons,where $n$ is an integer $(n = 0, 1, 2, ...)$.$1$. Pyridine $(C_5H_5N)$: It is a cyclic,planar,and fully conjugated system with $6 \pi$ electrons $(n=1)$. It is aromatic.$2$. Pyrrole $(C_4H_5N)$: It is a cyclic,planar,and fully conjugated system with $6 \pi$ electrons ($4$ from double bonds + $2$ from the lone pair on nitrogen). It is aromatic.$3$. Piperidine $(C_5H_{11}N)$: It is a saturated cyclic amine. It is not planar and lacks conjugation. It is non-aromatic.$4$. Aniline $(C_6H_5NH_2)$: It is a benzene derivative with an amino group. It is aromatic.Note: In the context of this question,all options except Piperidine are aromatic. However,if this is a single-choice question,Pyridine is a classic heterocyclic aromatic compound often used as an example.

$A$. 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?

Similar Questions

Which of the following molecules is (are) chiral?

$CH_3-CH=O$ $(I)$ $\rightleftharpoons$ $CH_2=CH-OH$ $(II)$
Between the two tautomers,which is more stable?

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

Total number of stereo-isomers possible for the following compound is:
$1,2$-disubstituted cyclohexane with a $-\text{CH}_2\text{OH}$ group at position $1$ and a $-\text{CH}=\text{CH}-\text{CH}=\text{CH}-\text{CH}_2\text{CH}_3$ group at position $2$.

Total number of stereoisomers possible for the given structure:

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