isomerism

• what is an isomer?

  molecules with the same molecular formula but arrangement of atoms
• what is structural isomerism?

  same Mr

  different structural formula
• what is chain isomerism?

  same Mr

  different arrangement of carbon skeleton (may be branched)
• what is position isomerism?

  same Mr

  same functional group

  different position on carbon chain
• what is functional group isomerism?

  same Mr

  atoms arranged into different functional groups
• what is stereoisomerism?

  2 molecules with same structural formula, atoms are arranged differently in space
• what type of isomerism do alkenes exhibit?

  geometric (due to limitations around C=C)
• what are the Cahn - Ingold - Prelog rules?

  1. look at 1 side of C=C label which atom/s have higher mass with high priority
  2. do same with other side of C=C
  3. label E/Z isomerism
• what is E isomerism?

  high priorities on opposite sides
• what is Z isomerism?

  high priorities on same side