Which is not heterocyclic compound _______________?
Correct answer: C. Aniline
- A. Furan
- B. Thiophene
- C. Aniline
- D. Pyridine
Explanation
A heterocyclic compound contains a ring in which at least one atom is a heteroatom such as nitrogen, oxygen or sulfur. Furan, thiophene and pyridine satisfy this condition, whereas aniline has a benzene ring with an -NH2 substituent outside the ring, so students may wrongly classify it as heterocyclic because it contains nitrogen.
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About Classification of Organic Compounds
Organic compounds are classified by carbon skeleton into open-chain, branched-chain and cyclic compounds, including homocyclic and heterocyclic types. The classification also uses functional groups to distinguish hydrocarbons, halo compounds, alcohols, aldehydes, ketones, carboxylic acids and their derivatives, which is different from naming compounds by IUPAC rules.
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