1. 22-4 Other Reactions of Organic Compounds Elimination Reactions Elimination reactionsElimination reactions remove a substance from adjacent carbons to form double or triple bonds. DehydrogenationDehydrogenation reactions remove hydrogens to increase the bond to a double or triple bond. dehydrogenation hydrogenationdehydrogenation hydrogenation

2. Addition Reactions DehydrationDehydration remove H and OH from adjacent carbons to form a double or triple bond. See pg 804 for a Summary of Addition Reactions. Catalysts are usually required to make reactions occur…catalysts lower activation energy and are not used up.

3. More Addition Reactions Examples of addition reactions …hydrogenation Hydration Halination

4. Oxidation Reduction Reactions Oxidation to form alcohols… Steps of oxidation from alcohols…to…

5. Reduction Addition of hydrogen/hydrogenation

6. 22-5 Polymers Polymers are large molecules composed of smaller links called monomers. Addition polymerization…all original atoms and molecules are preserved in the final product. Condensation polymers…a small molecules leaves to make room for the new polymer connections…like dehydration reactions in amino acids.

7. Properties of Recycling of Polymers Thermoplastic polymers can be melted and reformed into new products. Thermosetting polymers is one that can be molded when it is first melted, but not re-melted and formed…they have become a ‘single’ molecule.

8. Recycling of Plastics Currently about 5% of plastics are recycled.

9. Types of Plastic Recycling