Exam3-2007 key

Exam3-2007 key - CHEMISTRY 2261 EXAM 3 November 7, 2006...

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CHEMISTRY 2261 November 7, 2006 EXAM 3 NAME (PRINT)____________________________________________ 123456789 1 0 1 1 TOTAL 12 LIST number 1. (8 pts) Draw the expected major product of each step in each of the following reaction sequence. 2. (8 pts, 4 pts ea) Provide the required diene and dienophile for each of the following Diels-Alder reactions. a) b) H H O 2 N NH 2 N O O O O Ph O 2 N NH 2 N O O Ph O O Answer Key EWG on dienophile
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2 3. (8 pts) Choose (circle) the major isomer produced in the following Diels-Alder reaction. Me NMe 2 O 2 N Me + Δ NMe 2 Me Me NO 2 Me NMe 2 Me Me NO 2 Me NMe 2 Me Me Me NO 2 NMe 2 Me Me Me NO 2 NMe 2 Me Me NO 2 Me NMe 2 Me Me Me NO 2 NMe 2 Me Me NO 2 Me NMe 2 Me Me Me NO 2 NMe 2 Me Me NO 2 Me NMe 2 Me Me NO 2 Me NMe 2 Me Me Me NO 2 NMe 2 Me Me Me NO 2 NMe 2 Me Me NO 2 Me NMe 2 Me Me NO 2 Me NMe 2 Me Me Me NO 2 NMe 2 Me Me Me NO 2 Me wrong regiochem δ + δ cis (endo rule) wrong regiochem trans trans 4 . (11 pts) Draw resonance structures for the following delocalized anion. 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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Exam3-2007 key - CHEMISTRY 2261 EXAM 3 November 7, 2006...

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