Question

Is pyridine an aromatic compound?

Answer 1

Aromatic compound:

• A compound is known to be an aromatic compound if it is flat, cyclic, and conjugated and also obeys Huckel’s rule.
• Huckel's rule states to be called as aromatic, an organic compound should have pi electrons in the overlapping $\mathrm{p}$ orbitals.

Aromaticity of pyridine:

• The $\mathrm{\pi }$ orbital system of pyridine has $\mathrm{p}$ electrons that are delocalized throughout the ring, making it planar.
• It also has $4\mathrm{n}+2$ delocalized $\mathrm{p}$ electrons, where $\mathrm{n}=1$ .
• Pyridine has a planar structure because its$\mathrm{p}$orbitals are perpendicular to the ring.
• Also, it is a cyclic compound and it matches all the criteria of an aromatic compound, which makes it an aromatic compound.
• The structure of pyridine is given below:
  

• Also the protons of pyridine display chemical shifts in the NMR spectrum that are typical of aromatic protons.
• As an aromatic compound, pyridine may also participate in electrophilic substitutions as an electrophile.

Therefore, yes, pyridine is an aromatic compound.