3.31 quiz key

3.31 quiz key - H H 2 O H+ H H+ H H H H O H H H 2 O H O H H...

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Weekly Quiz March 31, 2006 1. Show the mechanism for generation of the product shown. OH H + O OH H+ H OH O H OH O 2. A key feature in the reactions of alkenes (and alkynes!) is to understand what is serving as the nucleophile and what is serving as the electrophile. Once these are identified you know that the nucleophile will attack the electrophile. Test your ability to recognize the nucleophile and electrophile for the reactions by filling in the table below. Reaction/Steps Step One Step Two Nucleophile Electrophile Nucleophile Electrophile H 2 O/H + Pi bond H+ from hydronium O on water Carbocation ctr HCl Pi bond H+ Cl- Carbocation ctr Br 2 in H 2 O Pi bond Br O on water Carbon in bromonium ion BH 3 * Pi bond Boron Hydride ion More subst.
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Carbon * This reaction is only one mechanistic step! There is only one transition state. 3. What are the structures of A and B in this two-step synthesis reaction? A B H 2 O H + H + heat OH = A = B note: stereochemistry is important. The E isomer is the major product! 4. Some harder problems:
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Unformatted text preview: H H 2 O H+ H H+ H H H H O H H H 2 O H O H H 2 O H O O H H H H H H 2 O H 2 O H O H O H H H 2 O C 7 H 14 O H O O O O 3 Zn, H + KMnO 4 ? ANSWER ANSWER 5. Fill out the following reaction trees found on the following pages. A: Cl Cl Minor Major Minor Cl B: OH OH OH Major Minor Minor C&D HO HO HO HO E: D D D D F: G: HO OH HO OH H K: L: M: N: Br Br Br Br Cl OH HO OH Cl Cl HO Cl HO OH C Cl Cl C Cl Cl C H H C H H or H REACTION TREE1 H: O O O O A: Cl H Cl H Cl H Cl H B: OH H OH H OH H OH H C&D: Both are same as B E: D D D D H H H H F: C Cl Cl H H C Cl Cl H H G: OH OH H H OH OH H H H&J: H O H O K: C H H H H C H H H H L: Br H H Br Br H H Br M: OH O O OH N: OH H H Br Br H H OH H H H H Br OH Br OH Reaction Tree 2 C Cl Cl H H C Cl Cl H H Reaction Tree Three A: Cl Cl (same) B&D: OH OH (same) C: OH H H OH E: D D D D F: G: OH OH OH OH H&J: O H O H K: C H H H H C H H H H L: Br Br Br Br M: N: O OH Cl OH Cl + CO 2...
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This homework help was uploaded on 04/20/2008 for the course CHEM 231 taught by Professor Montaguesmith during the Spring '06 term at Maryland.

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3.31 quiz key - H H 2 O H+ H H+ H H H H O H H H 2 O H O H H...

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