1. Alkenes

2. Low density Insoluble in water Non polar Torsion due to double bond Reactive double bond

3. Alkenes Aliphatic hydrocarbon molecules with at least one double bond Unsaturated bonds: double bonds (can turn into single bonds by adding hydrogen)

4. C n H 2n i.e. ethene = C2H4

5. IUPAC Naming Find the longest parent chain that includes the double bond Change the ending of the parent to “ene”

6. number the chain so that the double bond has the lowest number if there is more than one double bond, use the Greek language prefixes to indicate quantity

7. Example Name the following alkene:

8. Example 2 2,3-dimethylnon-4-ene

9. Cycloalkenes Unsaturated aliphatic hydrocarbons (alicyclic) C n H 2n-2

10. Example 1,9-diethyl cyclodec-1,3,5,7-tetra-ene

11. Alkynes

12. Aliphatic hydrocarbon molecules with at least one triple bond The triple bond causes the alkyne to act differently than with a double or single bond

13. C n H 2n-2 I.e. C2H2

14. IUPAC Naming Find the longest parent chain that includes the triple bond Change the ending of the parent to “yne”

15. number the chain so that the triple bond has the lowest number if there is more than one triple bond, use the Greek language prefixes to indicate quantity

16. Example Name the following alkyne

17. Example 2

18. Example 3 & 4 4-methyl pent-2-yne 4-pentyl hept-1,6-diyne - *** wrong naming** – 3-pentyl hept-1,6-diyne