9 - 2/10/2012 What is a good mechanism for the following...

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Unformatted text preview: 2/10/2012 What is a good mechanism for the following reaction that accounts for the catalytic role of FeBr3? What is a good mechanism for the following reaction that accounts for the catalytic role of FeBr3? Why is a catalyst needed? 1 4 What is a good mechanism for the following reaction that accounts for the catalytic role of FeBr3? What is a good mechanism for the following reaction that accounts for the catalytic role of FeBr3? A B A B Are there other reaction mechanisms? What is the reaction mechanism? A. The brominum ion B. The open cation? 5 Which compound is the electron acceptor (acid, electrophile)? 2 What is a good mechanism for the following reaction that accounts for the catalytic role of FeBr3? What is the slow step in the following reaction? A Eact Eact B energy 3 reaction 6 1 2/10/2012 What electrophile would be produced when HNO3 is treated with strong acid? Bromination What is the major product of the following reaction? A B C D 7 A B C What is the major product of the following reaction? Which of the following reactions, A or B, should go faster? Poly alkylation is a problem with the Friedel-Crafts reaction. A B A B C 8 What is the major product of the following reaction? Which of the following reactions, A or B, should go faster? Poly alkylation is a problem with the Friedel-Crafts reaction. A B A B C energy reaction 2 2/10/2012 What is the major product of the following reaction? Rearrangements are a problem with the Friedel-Crafts reaction. How can the product of this reaction be converted into 1-propylbenzene? A + minor product ? B A B C C What is the mechanism of the following reaction? Can the acyl cation rearrange? Why? A B How can the product of this reaction be converted into 1-propylbenzene? The Clemmensen reduction. Which cation is more stable? What is the mechanism of the following reaction? Can the acyl cation rearrange? Why? A B How does this reaction occur? Why is this reaction only successful for aromatic C=O groups? Which cation is more stable? 3 2/10/2012 How does this reaction occur? Why is this reaction only successful for aromatic C=O groups? Why does B react faster than A? What is the reaction mechanism? A B Is there a reaction that works for all C=O groups? What is the mechanism of this reaction? Wolff-Kishner reaction Which of the following reactions would occur faster? A B 4 ...
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