chap7solomons

chap7solomons - Chapter7 AlkenesandAlkynesI:...

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Created by Ch. 7 - Chapter 7 Chapter 7 Alkenes and Alkynes I: Alkenes and Alkynes I: Properties and Synthesis. Properties and Synthesis. Elimination Reactions Elimination Reactions of Alkyl Halides of Alkyl Halides
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Ch. 7 - About The Authors About The Authors These PowerPoint Lecture Slides were created and prepared by Professor  William Tam and his wife, Dr. Phillis Chang.   Professor William Tam received his B.Sc. at the University of Hong Kong in  1990 and his Ph.D. at the University of Toronto (Canada) in 1995.  He was an  NSERC postdoctoral fellow at the Imperial College (UK) and at Harvard  University (USA).  He joined the Department of Chemistry at the University of  Guelph (Ontario, Canada) in 1998 and is currently a Full Professor and  Associate Chair in the department.  Professor Tam has received several  awards in research and teaching, and according to  Essential Science  Indicators , he is currently ranked as the Top 1% most cited Chemists  worldwide.  He has published four books and over 80 scientific papers in top  international journals such as  J. Am. Chem. Soc., Angew. Chem., Org. Lett.,  and  J. Org. Chem.   Dr. Phillis Chang received her B.Sc. at New York University (USA) in 1994, her  M.Sc. and Ph.D. in 1997 and 2001 at the University of Guelph (Canada).  She  lives in Guelph with her husband, William, and their son, Matthew.
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Ch. 7 - 1. Introduction Alkenes Hydrocarbons containing C=C Old name: olefins CH 2 OH Vitamin A HO H 3 C H 3 C H H Cholesterol
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Ch. 7 - Alkynes Hydrocarbons containing C C Common name: acetylenes O N H O Cl Efavirenz (antiviral, AIDS therapeutic) C F 3 C C Cl Cl Cl O C C I Haloprogin (antifungal, antiseptic)
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Ch. 7 - 1. The ( E ) - ( Z ) System for  Designating Alkene Diastereomers Cis - Trans  System Useful for 1,2-disubstituted alkenes Examples: Cl Br H H Cl H Br H (1) vs trans  - 1-Bromo- 2-chloroethene cis  - 1-Bromo- 2-chloroethene
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Ch. 7 - Examples H H (2) vs trans  - 3-Hexene cis  - 3-Hexene H H Br (3) vs trans  - 1,3- Dibromopropene cis  - 1,3- Dibromopropene Br Br Br
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Ch. 7 - Cl Br CH 3 H e.g. cis  or  trans ? Cl is  cis  to CH 3 and  trans  to Br (E)  -  (Z)  System Difficulties encountered for  trisubstituted and tetrasubstituted  alkenes
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Ch. 7 - The Cahn-Ingold-Prelog  (E)  -  (Z)   Convention The system is based on the atomic  number of the attached atom  The higher the atomic number, the  higher the priority
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Ch. 7 - The Cahn-Ingold-Prelog  (E)  -  (Z)   Convention (E)  configuration – the highest priority  groups are on the  opposite  side of the  double bond E
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This note was uploaded on 02/25/2011 for the course CHEM 222 taught by Professor Harding during the Spring '08 term at CUNY Hunter.

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chap7solomons - Chapter7 AlkenesandAlkynesI:...

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