1. Objectives
To learn to name hydrocarbons with double and triple bonds
To understand addition reactions
To learn about the aromatic hydrocarbons
To learn to name aromatic compounds

2. A. Alkenes and Alkynes
Alkenes – hydrocarbon containing carbon-carbon double bonds
General formula CnH2n
Alkynes – hydrocarbons containing carbon-carbon triple bonds
General formula CnH2n - 2

3. A. Alkenes and Alkynes

4. A. Alkenes and Alkynes
Reactions of Alkenes
Addition reactions – new atoms form single bonds to the carbons formerly involved in a double or triple bond
Hydrogenation – use H2 as the reactant to be added
Halogenation – addition of halogen atoms
Polymerization – joining of many small molecules to form a large molecule

5. B. Aromatic Hydrocarbons
Aromatic hydrocarbons – cyclic unsaturated hydrocarbons with strong aromas

6. B. Aromatic Hydrocarbons
Benzene – simplest aromatic hydrocarbon

7. C. Naming Aromatic Compounds
Monosubstituted benzenes –
use the substituent name as
a prefix of benzene

8. C. Naming Aromatic Compounds
Disubstituted benzenes – use numbers to indicate the position of substituents and the substituent name as a prefix of benzene

9. C. Naming Aromatic Compounds
Complex aromatic molecules