1. Phenols

2. HW: Hw1 Q 5 (12 marks)

3. L.O.:  Describe the reactions of phenols with aqueous alkalis and with sodium to form salts  Discuss the roles of phenol as an early antiseptic  Describe the reaction of phenol with bromine to form 2,4,6-tribromophenol  Explain the relative ease of bromination of phenol compared to benzene  State the uses of phenols in plastics, antiseptics, disinfectants and paints

4. Phenol as an acid Phenoxy ion Phenol is weakly soluble in water and produces solutions with a pH of about 5 to 6

5. Reaction with sodium

6. Uses of phenols Found in: surfactants and detergents disinfectants Used to make pharmaceuticals like aspirin Epoxy resins found in paints

7. Experiment: reaction of phenol with bromine 1) Write down 2 observations. 2)Name the product formed 3) Write a balanced equation

9. Explain the relative ease of bromination of phenol compared to benzene

10. Clue #1. R-O-H

11. Clue #2

12. Comparing the charge densities of phenol with benzene Phenol Benzene

13. Clue #3. Which structure can polarise bromine molecules?

14. Explain the relative ease of bromination of phenol compared to benzene ( 3 marks + 1 Qwc) Lone pair of electrons on the oxygen atom → higher electron density in the ring → the increased electron density polarises bromine molecules.