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Topic 20 4 condensation reactions

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  • 1. IB Chemistry Power Points Topic 20 Organic Chemistrywww.pedagogics.ca Condensation Reactions
  • 2. Condensation Reactions – Big IdeaTwo smaller molecules combine to form one larger molecule.A small molecule, usually water, is eliminated in the process
  • 3. Esterification Process – RCOOH +ROHEsters have distinct fruity smells.Used extensively in industry for fragrance and flavoring.The esterification reaction is also important in formation ofpolymers
  • 4. Amide formation - RCOOH + RNH2 Example 1: Sketch a diagram to show the formation of ethyl butanoate by the process of esterification. Example 2: Sketch a diagram to show the formation of the amide product of a reaction between ethanol and propylamine.
  • 5. Condensation Polymerization - ExamplesRecall – polymers are long chains of subunits called monomers.If reacting molecules each have two functional groups that canundergo condensation, a polymer chain can form.Consider: ethane-1,2-diol and benzene-1,4- (ethylene glycol) dicarboxylic acid
  • 6. Formation of Terylene (Dacron)Monomer subunit would look like this.
  • 7. Formation of Terylene (Dacron) + a bunch of H2O
  • 8. Polymerization reactions – nylon 6,6 HOOC(CH2)4COOH hexan – dioic acid + H2N(CH2)6NH2 1,6 diamino - hexane
  • 9. Polymerization reactions – nylon 6,6
  • 10. Proteins - polypeptidesGeneral formula of an amino acid monomer
  • 11. Proteins - polypeptides