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Question

An organic compound X (molecular formula C6H7O2N) has six carbon atoms in a ring system having two double bonds and a nitro group as a substituent. The compound X is:

A
homocyclic but not aromatic
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B
aromatic but not homocyclic
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C
homocyclic and aromatic
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D
heterocyclic and aromatic
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Solution

The correct option is D homocyclic but not aromatic
For a compound to be aromatic, it must have (4n+2)π electrons.
Here two double bonds are present, 4π electrons are present in the compound.
Therefore, it is anti-aromatic.

Homocyclic compounds are ring structures that consist only of carbon atoms within the ring. A nitro group is attached to the ring system as a substituent, so, C6H7NO2 is homocyclic but not aromatic.

Hence, option A is correct.

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