JEE Main · 2024 · Shift-IeasyGOC-002

Cyclohexene is 2cm type of an organic compound. (a) Benzenoid aromatic (b) Benzenoid non-aromatic (c) Acyclic (d)…

General Organic Chemistry (GOC) · Class 11 · JEE Main Previous Year Question

Question

Cyclohexene is \underline{\hspace{2cm}} type of an organic compound.

(a) Benzenoid aromatic
(b) Benzenoid non-aromatic
(c) Acyclic
(d) Alicyclic

Options
  1. a

    Benzenoid aromatic

  2. b

    Benzenoid non-aromatic

  3. c

    Acyclic

  4. d

    Alicyclic

Correct Answerd

Alicyclic

Detailed Solution

Classification of Organic Compounds:

Organic compounds can be classified based on their structure:

  1. Acyclic (Open-chain): Compounds with open carbon chains (e.g., alkanes, alkenes)
  2. Cyclic: Compounds with closed carbon rings
    • Alicyclic: Cyclic compounds that are NOT aromatic (e.g., cycloalkanes, cycloalkenes)
    • Aromatic: Cyclic compounds following Hückel's rule (4n+2 π electrons)
      • Benzenoid: Contain benzene ring
      • Non-benzenoid: Aromatic but no benzene ring

Structure of Cyclohexene:

Cyclohexene has a six-membered ring with one C=C double bond. It does NOT contain a benzene ring and does NOT satisfy Hückel's rule for aromaticity.

Classification:

  • ❌ Not acyclic (it has a ring)
  • ❌ Not benzenoid (no benzene ring)
  • ❌ Not aromatic (doesn't follow Hückel's rule)
  • Alicyclic (cyclic, non-aromatic)

Answer: (d) Alicyclic\boxed{\text{Answer: (d) Alicyclic}}

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