An organic compound X (molecular formula, .C6 H7 O2 N) has six carbon atoms in a ring system, t

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An organic compound X (molecular formula, .C6 H7 O2 N) has...

An organic compound $\mathrm{X}$ (molecular formula, $\left.\mathrm{C}_{6} \mathrm{H}_{7} \mathrm{O}_{2} \mathrm{~N}\right)$ has six carbon atoms in a ring system, two double bonds and a nitro group as substituent $\mathrm{X}$ is (1) Homocyclic but not aromatic (2) Aromatic but not homocyclic (3) Homocyclic and aromatic (4) Heterocyclic and aromatic

An organic compound $\mathrm{X}$ (molecular formula, $\left.\mathrm{C}_{6} \mathrm{H}_{7} \mathrm{O}_{2} \mathrm{~N}\right)$ has six carbon atoms in a ring system, two double bonds and a nitro group as substituent $\mathrm{X}$ is
(1) Homocyclic but not aromatic
(2) Aromatic but not homocyclic
(3) Homocyclic and aromatic
(4) Heterocyclic and aromatic

Key Concepts

Aromaticity

Aromaticity is the concept that describes cyclic, planar compounds with a delocalized ?-electron system that satisfies Huckel’s rule (4n+2 ? electrons). Aromatic compounds are unusually stable due to electron delocalization, and their structure typically involves alternating double bonds that form a fully conjugated system.

Homocyclic vs Heterocyclic Compounds

Homocyclic compounds are cyclic structures in which all the atoms in the ring are of the same element (typically carbon), whereas heterocyclic compounds contain one or more different elements in the ring. Recognizing the type of ring is important in evaluating the properties of a molecule, such as its reactivity and electronic structure.

Degrees of Unsaturation

The degree of unsaturation is a calculation used to determine the number of rings and/or multiple bonds in a molecule. It helps in deducing the possible structural features of a compound by comparing the actual number of hydrogens to that of a fully saturated analogue, thereby indicating the presence of double bonds, triple bonds, or rings.

Substituent Effects - Nitro Group

The nitro group is a common substituent in organic chemistry that can significantly affect the electronic properties of a molecule. It is an electron-withdrawing group due to the electronegative oxygen atoms, and its presence can influence both the reactivity and the stability of the aromatic or non-aromatic ring systems.

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