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*3.2.11 reduction of unsaturated compounds

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chem whatarethemechanismsofchemicalchange

Reactivity 3.2.11 - reduction of unsaturated compounds by the addition of hydrogen lowers the degree of unsaturation
  • alkenes and alkynes contain reactive bonds
  • this enables them to undergo addition reactions

alkenes react by electrophilic addition

alkenes reduced to alkanes by reacting with hydrogen:

alkynes reduced to alkenes and alkanes

C#C.[H][H]>>[H]C([H])=C([H])[H]
[H]C([H])=C([H])([H])>>CC
challenge questions
  1. show that the number of hydrogen molecules needed to saturate a molecule with the molecular formula is given by the general formula:

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