1. Outline:1/19/07 n n Pick up Quiz #1 – from me n n Chem Seminar: today @ 4pm n n Chapter 13 (cont’d) Macromolecules

2. Quiz #1 n Average: 6.2 / 10 n What to do if…

3. Organic Chemistry: n n Nomenclature: Alkanes, Alkenes, Alkynes Branched chain alkanes Aromatic compounds Functional groups n n Organic Reactions n n Polymers Definitions Properties Intro to Biochemistry….

4. Organic Chemistry: n n Nomenclature: Alkanes, Alkenes, Alkynes Branched chain alkanes Aromatic compounds Functional groups Let’s test the keypad units….

5. What color is the sky… 1. Red 2. Blue 3. Green 4. Sky, what sky?

6. What type of functional group is this? 1.Amine 2. Aldehyde 3. Thiol 4. Acid

7. What’s the correct name for: 1. 1,1 – dimethyl propane-1-thiol 2. 2 – methyl butane-1-thiol 3. 3- methyl pentane-1-thiol 4. 3- methyl butane-1-thiol

8. Polymerizable Functional Groups p. 111

9. Polymer Linkage Groups p. 111

10. Organic Reactions Substitution reactions e.g. ethanol + HBr Addition reactions Condensation reactions e.g. ethene + HBr e.g. esters…. General class of reaction Example Some specific reactions  acid + alcohol  ester + water

11. Acid + Alcohol = salicylic acid methanol

12. ester + water methyl salicylate (oil of wintergreen)

13. What type of reactions are shown on page 112 of the image book? Condensation reactions

14. Polymers n n Poly = “many” + mer = “part”

15. e.g. Alkene polymerization: Chloroethene monomers (vinyl chloride)  PolyVinyl Chloride What type of reaction? addition

16. Chemical Polymerization Reactions n There are four types of chemical polymerization reactions: 1. Free Radical Polymerizations. 2. Condensation Polymerizations. 3. Cationic Polymerizations. 4. Anionic Polymerizations. Only type 1 and 2 polymerizations in Chapter 13…

17. Chemical Polymerization Reactions n There are four types of chemical polymerization reactions: 1. Free Radical Polymerizations. p. 113

18. Chemical Polymerization Reactions ethylene polyethylene

20. What are examples of polymers? n polyethylene, polypropylene (plastic), n polyvinylchloride (PVC), n polystyrene (packing beads), n polyvinylacetate (latex), n polymethylmethacrylate, (Plexiglass), n polytetrafluroethylene (teflon), n poly-cis-isoprene (synthetic rubber), n composites (reinforced plastics), n polyamides (kevlar)

21. U.S. only 15.7 8.0 6.6 2.9 2003 figures

22. Categories of polymers: n n Plastics vs. Elastomers n n Thermoplasts vs. Thermosets u u Cross-linking / vulcanization n n Addition polymers vs. Condensation polymers Don’t need to know all the names…. need to be able to recognize polymers and their monomer units

23. What could be the monomer(s)?

24. Two different monomers: OO Cl OO N N H

25. = = C(CH 2 ) 4 C N (CH 2 ) 6 N == OO H H n + H 2 O n Two molecules form bonds between their functional groups by displacing water O O O O HOC(CH 2 ) 4 COH + H 2 N(CH 2 ) 6 NH 2 HOC(CH 2 ) 4 COH + H 2 N(CH 2 ) 6 NH 2 Polymer Demo: Nylon-66

26. Up Next: Biopolymers – carbohydrates – DNA/RNA – proteins Enthalpy (Chapter 6) revisited