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JEE Advanced · 2010 · 11 Apr 2010 · Paper 1 · General Organic Chemistry

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The total number of cyclic isomers possible for a hydrocarbon with the molecular formula is

Answer: 5

Solution

For , the degree of unsaturation is 2. The cyclic isomers are:
  1. Cyclobutene (four-membered ring with one double bond)
  2. Methylcyclopropene (three-membered ring with one double bond and one methyl substituent)
  3. 1-Methylcyclopropene (methyl group at position 1)
  4. 3-Methylcyclopropene (methyl group at position 3)
  5. Bicyclo[1.1.0]butane (bicyclic structure with two three-membered rings sharing an edge)

Total: 5 cyclic isomers.

JEE Advanced · 2010 · 11 Apr 2010 · Paper 1 · Integer answer

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