Exam3-2006

Exam3-2006 - CHEMISTRY 2261 EXAM 3 November 8 2006...

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CHEMISTRY 2261 November 8, 2006 EXAM 3 NAME (PRINT)____________________________________________ 123456789 1 0 1 1 TOTAL LIST number 1. (12 pts, 4 pts ea) For each of the following substituted cyclohexane, draw both possible chair conformations and indicate which conformation is more stable or whether both are equally stable. a) b) c) Br 2 H 2 O 1. BH 3 2. HOOH, NaOH HBr peroxide 2. (8 pts) Draw the expected major product of each step in each of the following reaction sequence. HBr (1 equiv) 1. BH 3 2. HOOH NaOH peroxide
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2 3. (8 pts, 4 pts ea) Provide the required diene and dienophile for each of the following Diels-Alder reactions. a) b) O H H CO 2 Me Me 2 N NO 2 4. (8 pts) Choose (circle) the major isomer produced in the following Diels-Alder reaction. Me CN Me + Δ O Me O CN Me Me O CN Me Me O Me CN Me O Me CN Me O CN Me Me O CN Me Me O Me CN Me O Me CN Me O CN Me Me O CN Me Me O Me CN Me O Me CN Me O CN Me Me O CN Me Me O Me CN Me O Me CN
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3 5. . (12 pts) Draw significant resonance contributors for the following structure. Identify the major resonance contributor(s).
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This note was uploaded on 04/21/2010 for the course CHEM 2261 taught by Professor Crowe during the Fall '08 term at LSU.

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Exam3-2006 - CHEMISTRY 2261 EXAM 3 November 8 2006...

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