Reactions_in_Alkenes.pptxaahkjbknbnkkkll

Chemistry topic

1. Reactions in Alkenes Understanding the Chemical Behavior of Alkenes

2. Introduction to Alkenes • Alkenes are hydrocarbons with at least one carbon-carbon double bond. • General formula: CnH2n. • More reactive than alkanes due to the presence of the π-bond.

3. Types of Reactions in Alkenes 1. Addition Reactions 2. Oxidation Reactions 3. Polymerization

4. Addition Reactions • Alkenes undergo addition reactions due to their double bond. • Common addition reactions: - Hydrogenation (Addition of H2) - Halogenation (Addition of X2) - Hydrohalogenation (Addition of HX) - Hydration (Addition of H2O)

5. Oxidation Reactions • Alkenes can be oxidized to different products depending on the reaction conditions. • Common oxidation reactions: - Epoxidation - Hydroxylation - Ozonolysis

6. Polymerization • Alkenes can undergo polymerization to form long-chain polymers. • Example: Ethene polymerizes to form polyethene (polythene).

7. Applications of Alkene Reactions • Hydrogenation is used in food industries (e.g., margarine production). • Polymerization is used in plastics manufacturing. • Oxidation reactions are used in chemical synthesis.

8. Conclusion • Alkenes are highly reactive due to their double bond. • They undergo various reactions including addition, oxidation, and polymerization. • These reactions have significant industrial and scientific applications.