Isomer definitions - quiz

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  • Created by: Tasha.L
  • Created on: 11-09-16 12:09

1. Define 'geometric isomer'.

  • They occur in alkenes only due to the restricted rotation about the double bond, caused by the pi bond.
  • They have the same molecular formula but a different arrangement of atoms in space.
  • They have the same molecular formula but differ in how they act with plane polarised light.
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2. Define 'positional isomer'.

  • They have the same structural formula and chain length, but differ in the position of their functional group.
  • They have the same molecular formula but different functional groups.
  • They have the same molecular formula but a different arrangement of atoms in space.

3. Define 'functional isomer'.

  • They have the same molecular formula but different functional groups.
  • They have the same molecular formula but a different structural formula.
  • They have the same molecular formula and chain length, but differ by the position of the functional group.

4. Define 'stereo isomer'.

  • They have the same molecular formula but differ in the arrangement of the carbon chain.
  • They have the same molecular formula but a different arrangement of atoms in space.
  • They have the same molecular formula, but interact differently with plane polarised light.

5. Define 'optical isomer'.

  • They have the same molecular formula and chain length, but differ by the position of the functional group.
  • They have the same molecular formula but interact with plane polarised light differently.
  • They have the same molecular formula but a different structural formula.
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