Which of the following is aromatic?

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(D) compound is aromatic if it is cyclic,planar,fully conjugated,and follows $H$ückel's rule ($4n+2$ $\pi$ electrons).$A$. Cyclopropenyl anion has $4$

Vedclass · Accepted Answer

Pyrylium cation

Vedclass · Answer

(D) compound is aromatic if it is cyclic,planar,fully conjugated,and follows $H$ückel's rule ($4n+2$ $\pi$ electrons).$A$. Cyclopropenyl anion has $4$ $\pi$ electrons ($2$ from the double bond and $2$ from the lone pair on the carbon atom),which is anti-aromatic.$B$. Cyclopentadienyl cation has $4$ $\pi$ electrons,which is anti-aromatic.$C$. Pyridine is a heterocyclic aromatic compound with $6$ $\pi$ electrons.$D$. Pyrylium cation is a heterocyclic aromatic compound with $6$ $\pi$ electrons.Both $C$ and $D$ are aromatic. However,based on the provided solution image,the question specifically highlights the pyrylium cation structure.

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