2 (01-25) - 1/25/2012 What is the mechanism of the...

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Unformatted text preview: 1/25/2012 What is the mechanism of the following reaction? What is the mechanism of the following reaction? Pass your answer sheet to the course interns for 2 points toward your total of 600! How can Br2 react with hydrocarbons? How can we create low concentrations of Br2? rate ~ [Br2]1 rate ~ [Br2]2 What is the mechanism of the following reaction? What is the major product of the following reaction? ? A B C D E F 1 1/25/2012 What is the major product of the following reaction? The Diels-Alder reaction has often be called organic chemistry's most important synthetic reaction. Diels-Alder reaction Why? What important structural features are created in the Diels-Alder reaction? An important synthetic reaction A B C D E F Who was the graduate student? What is the mechanism of this reaction? Diels-Alder reaction (1928) Diels-Alder reaction (1928) 1950 Otto Diels A Kurt Alder B Which of the following reactions is faster? A B Which of the following reactions is faster? A B 2 1/25/2012 Which of the following reactions is faster? A B What is the mechanism of the Diels-Alder reaction? energy concerted reaction energy two step reaction Are there other models of the Diels-Alder reaction? An orbital view of the Diels-Alder reaction. energy concerted reaction energy two step reaction Would the LUMO of C=C be (A) higher or (B) lower in energy than C=C of acrolein? ethylene 4 * 3 2 energy acrolein 4 Which HOMO(diene)-LUMO(dieneophile) combination would be important in the Diels-Alder reaction? A. 1-* 4 * 3 2 energy * 3 B. 2-* C. 1- D. 2- 2 1 1 1 3 ...
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