Which is not present as heteroatom in heterocyclic compounds?
Correct answer: D. Chlorine
- A. Sulphur
- B. Nitrogen
- C. Oxygen
- D. Chlorine
Explanation
Heteroatoms in a cyclic structure must be able to form at least two covalent bonds to be part of the ring. Chlorine, being a halogen, typically forms only one covalent bond and therefore cannot act as a heteroatom within a ring.
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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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