MolSynapsequestion bank
MolSynapse / Question bank / IUPAC Nomenclature and Structural Isomerism / Bicyclo and spiro names from drawings
JEE Main levelSingle correct optionDifficulty 2 of 3nm253

What is the von Baeyer name of the compound shown? Give the double bond the lowest locant.

  1. Abicyclo[2.2.1]hept-2-ene
  2. Bbicyclo[2.2.2]oct-2-ene
  3. Cbicyclo[3.1.1]hept-2-ene
  4. Dbicyclo[2.2.1]hept-5-ene

Answer: A

The compound is bicyclo[2.2.1]hept-2-ene (norbornene). The ring system is bicyclo[2.2.1]heptane; the double bond is placed in a two-carbon bridge and numbered from bridgehead C1 to get the lowest locant, 2. The locant 5 describes the same bond numbered the long way round.
Practice IUPAC Nomenclature and Structural Isomerism More on Bicyclo and spiro names from drawings
Previous questionNext question

More questions on Bicyclo and spiro names from drawings