Outline: 1/19/07

Pick up Quiz #1 – from me Chem Seminar: today @ 4pm Chapter 13 (cont’d)

Macromolecules

Quiz #1

Average: 6.2 / 10Average: 6.2 / 10 What to do if…What to do if…

Organic Chemistry: Nomenclature: Alkanes, Alkenes, Alkynes Branched chain alkanes Aromatic compounds Functional groups Organic Reactions Polymers Definitions

Properties Intro to Biochemistry….

Organic Chemistry: Nomenclature: Alkanes, Alkenes, Alkynes Branched chain alkanes Aromatic compounds Functional groups

Let’s test the keypad units….

What color is the sky…

11 22 33 44 55

1.1. RedRed

2.2. BlueBlue

3.3. GreenGreen

4.4. Sky, what sky?Sky, what sky?

What type of functional group is this?

11 22 33 44 55

1. Amine

2. Aldehyde

3. Thiol

4. Acid

What’s the correct name for:

11 22 33 44 55

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

Polymerizable Functional Groups

p. 111

Polymer Linkage Groups

p. 111

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

Acid + Alcohol =

salicylic acid methanol

ester + water

methyl salicylate (oil of wintergreen)

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

C

ondensation

reactions

Polymers Poly = “many” + mer = “part”

e.g. Alkene polymerization:

Chloroethene monomers(vinyl chloride)

PolyVinyl Chloride

What type of reaction?

addition

Chemical Polymerization Reactions

There are four types of chemical There are four types of chemical polymerization reactions:polymerization reactions:

1.1. Free Radical Polymerizations.Free Radical Polymerizations.2.2. Condensation Polymerizations.Condensation Polymerizations.3.3. Cationic Polymerizations.Cationic Polymerizations.4.4. Anionic Polymerizations.Anionic Polymerizations.Only type 1 and 2 polymerizations in Only type 1 and 2 polymerizations in

Chapter 13…Chapter 13…

Chemical Polymerization Reactions

There are four types of chemical There are four types of chemical polymerization reactions:polymerization reactions:

1.1. Free Radical Polymerizations.Free Radical Polymerizations.

p. 113

Chemical Polymerization Reactions

ethylene

polyethylene

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

U.S. only

15.7

8.0

6.6

2.9

2003 figures

Categories of polymers:

Plastics vs. Elastomers Thermoplasts vs. Thermosets

Cross-linking / vulcanization Addition polymers vs. Condensation

polymers

Don’t need to know all the names….need to be able to recognize polymersand their monomer units

What could be the monomer(s)?

Two different monomers:

OO

Cl

O O

Cl

N

NH H

H H

= =

C(CH2)4C N (CH2)6 N==O O HH

n

+ H2O

Two molecules form bonds between their Two molecules form bonds between their functional groups by displacing waterfunctional groups by displacing water

O OO O

HOC(CHHOC(CH22))44COH + HCOH + H22N(CHN(CH22))66NHNH22

Polymer Demo: Nylon-66

Up Next: Biopolymers

– – carbohydratescarbohydrates

– – DNA/RNADNA/RNA

– – proteinsproteins

Enthalpy (Chapter 6) revisitedEnthalpy (Chapter 6) revisited