1. Alkenes:Electrophilic addition and carbocation rearrangement (McM 6.12) Alkenes: Hg-mediated addition of water or alcohols (McM 7.4, 18.4) Alkynes: Hg-mediated addition of water (McM 8.5) Alkynes: Oxidative cleavage (McM 8.7) Alkenes: Reactions with carbenes (McM 7.6) Alkenes: Addition of radicals (McM 7.10)

2. Cation Rearrangement 1,2 Hydride shift Hydride shift Alkyl group shift

3. Carbenes McM chapt 7.6, lab ex. 7 Neutral Divalent 6 valence electrons - Highly reactive Electron deficient /electrophilic properties

4. electron pair, opposite spin cation / anion properties diradical properties Gives triplet signal in esr spektrum Triplet normally somewhat more stable than singlet Singlets more reactive

5. prod. from triplet prod. from singlet high energy barrier triplet - prod.

6. Polymerization of alkenes (McM 7.10) Radical polymerization Cationic polymerization Conformation of polymer - Properties Polymers - Synthetic macromolecules linear polymer crystalline solid Amorphous solid Both linear and amorph areas hardness - drawn to fibers elasticity

7. stereochemistry