Question

Which one of the following is not a heterocyclic aromatic compound ?
1. Tropolone
2. Furan
3. Thiophene
4. Pyridine

Answer 1

Correct Answer - Option 1 : Tropolone

The correct answer is Tropolone.

 

• Tropolone
  • Tropolone is a cyclic ketone.
  • A seven-membered aromatic ring compound.
  • The formula of Tropolone is C₇H₅(OH)O.

 

• Furan
  • Furan is a heterocyclic organic compound, consisting of a five-membered aromatic ring with four carbon atoms and one oxygen atom.
  • Chemical compounds containing such rings are also referred to as furans.
  • Chemical formula of Furan is C₄H₄O.
  • Furan is a colorless, flammable, highly volatile liquid with a boiling point close to room temperature.
• Thiophene
  • Thiophene is a heterocyclic compound with the formula C₄H₄S.
  • It is aromatic as indicated by its extensive substitution reactions.
  • It is a colorless liquid with a benzene-like odor.
• Pyridine
  • Pyridine is a basic heterocyclic organic compound with the chemical formula C₅H₅N. 
  • Pyridine is cyclic, conjugated, and has three pi bonds.

 

• A heterocyclic compound is an organic compound in which one or more of the carbon atoms of the molecule is replaced by an atom other than carbon.
• Typical heteroatoms include nitrogen, oxygen, and sulfur.
• Pyridine (C₅H₅N), pyrrole (C₄H₅N), furan (C₄H₄O), and thiophene (C₄H₄S), Tropolone(C₇H₅O) are examples of heteroaromatic compounds.