2. Organic chemistry Faculty of Allied Medical Sciences (MGOC-101)

3. Supervision: Prof.Dr.Shehata El-Sewedy Dr. Fatma Ahmed Alkynes

4. Outcomes By the end of this lecture, the students will be able to formula of alkynes 1-Recognize formula of alkynes 2-Known nomenclature of alkynes 3- learn to preparation of alkynes 4-Differentiate between reaction of alkynes

5. Alkynes 2-General formula C n H 2n-2 3-Triple bonds 4-Straight or branched chain. 1-Alkynes are fully unsaturated hydrocarbons as function group of alkyne

6. Nomenclature 1-Common name Acetylene or ethyne Methyl acetylene or propyne Dimethyl acetylene 2-IUPAC name Position+prefix+yne Alkyl +yne

7. Synthesis of alkyne 1-Dehydrohalogenation of alkyl dihalide by using NaNH 2 (sodamide) R= CH 3, C 2 H 5,..........

8. 2-Dehalogenation of alkyl tetrahalide R=CH 3,C 2 H 5,…….. EX:

10. Reaction of alkyne 1-Addition of water (Hydration of alkyne)

11. 2-Addition of hydrogen

12. 3-Oxidative cleavage of alkyne

13. Quiz time

14. Write the chemical formula for the following compounds? How can you prepare the following compound? 5,5-Dimethyl-1-hexyne propyne Butyne Acetaldehyde Propanoic acid Acetic acid

15. Student Question

16. Complete

18. Write the nomenclature for the following compounds?

19. Assignments Group A and Group B Mahmoud Mohamad- Amir Mohamad- Mervat Abd El-Halim- Mervat Essam – Yasmine Rabee Applications of Alkynes Noor El-Din Adel Mohamad Abd El Fatah Ali Mahmoud Ahmad Uses of Butyne in industry Naamat Hafez Mana Allah Mostafa Passant Ahmad Hamza Applications of propanoic acid Ashraf Mohamad El Amir Said Tawfik Ibrahim Shahaat Ahmad Mahmoud Sherif Raafat AbdAllah Uses of alkynes in industry

20. Recommended textbooks: 1-Raymond Chang. Chemistry: An introduction to organic chemistry. 10th ed. 2009 2008 2-Zumdehl. Organic Chemistry; study guide and solution manual. 2008