1. www.soran.edu.iq Organic and biochemistry Assistance Lecturer Amjad Ahmed Jumaa  Reaction of the alkene.  Addition of hydrogen. 1

2. www.soran.edu.iq Reactions of alkenes Reactions of the carbon-carbon double bond  Addition reactions A reaction in which two molecules combine to yield a single molecule of product is called addition reactions. 1-Additin of hydrogen. Catalytic hydrogenation :

3. www.soran.edu.iq 3 Example:

4. www.soran.edu.iq Problem: write the structure of the products and the condition of the addition of hydrogen for the following alkenes: 1-(2-methyl propene) 2-(1-Butene) 3-(2-methyl-2-butene). Problem: write the structure of the products and the condition of the addition of hydrogen for the following alkenes: 1-(2-methyl propene) 2-(1-Butene) 3-(2-methyl-2-butene). Solution: 2-methyl propane

5. www.soran.edu.iq 5 2-methyl butane CH 3 CH 2 CH 2 CH 3 Butane

6. www.soran.edu.iq 6 Follow problem: give the structure and the names and the conditions for the addition of the hydrogen for the following alkenes: 1-(3-methyl-2-pentene) 2-(5-ethyl-1-heptene) 3-(2, 3-dimethyl- 2-butene).