1. Ch 13 Carboxylic Acids, Esters, Amines and Amides SWBAT: Name/Draw compounds with functional groups Describe/Explain properties of functional groups Complete/Show reactions of functional groups

2. Chapter 13.1 Carboxylic Acids

3. Carboxylic Acids Functional Group: Carboxyl Group – Carbonyl and Hydroxyl at the same carbon Condensed writing: COOH Carboxyl Carbon is C #1 Alkyl prefix….end in -oic acid methanoic acid methylpropanoic acid 3-methylpentanoic acid

4. Benzoic Acid Carboxyl on a benzene Carboxyl is attached to C #1 List all substituents by alpha Number either cw or ccw in order to get lowest numbers! 4-bromo-2-methylbenzoic acid

5. Naming Practice Parent alkane has to include carboxylic acid

6. Drawing Practice Draw: 2-methyl-3-phenyl-pentanoic acid 4-iodo-2-isopropyl-benzoic acid

7. Common Names

8. Fatty Acids Very long carboxylic acids Which one has a higher boiling pt? Why? Which one is a solid (fat) which a liquid (oil) at RT

9. Alpha Hydroxy Acids (AHA) Hydroxyl groups on the α Carbon: Carbon # 2 Natural occurring acids in sour milk and fruits Part of many skin care products to exfoliate and smooth skin

10. Homework Chapter 13 Page 430 13.6 and 13.8

11. Chapter 13.2 Properties of Carboxylic Acids

12. Acid Behavior Acids are Hydrogen (H+) Donors Carboxylic Acids dissociate in water and lower the pH aq COOH + H 2 O → COO - + H 3 O + carboxylate ion & hydronium ion

13. Boiling Point Carboxylic Acids have the highest boiling point of organic molecules More partial charges (4) than alcohols (3)

14. Solubility Carboxylic Acids dissolve very well in water Form H-bonds with water molecules But the longer the C-chain, the less soluble!

15. Solubility

16. Chapter 13.2 continued Reactions of carboxylic acids

17. Dissociation Rx When carboxylic acids dissociate they form a carboxylate ion Example: HCOOH → HCOO- + H+ Methanoic Acid Methanoate Ion

18. Neutralization Rx Carboxylate anions can react with metal cations to form carboxylic acid salts: COOH + NaOH → COO-Na+ + H2O Sodium methanoate

19. Name the following: Pentanoate Ion Potassium ethanoate or Potassium acetate

20. Homework Chapter 13 Page 434 13.10 – 13.16