Answered: 3. Draw the complete mechanism and use…

3. Draw the complete mechanism and use the mechanism to predict the major product(s). Include stereochemistry where appropriate. a. H-Br -78 °C

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter14: Elimination

Section: Chapter Questions

Problem 18E

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Concept explainers

Designing a Synthesis

Organic synthesis is a branch of chemical synthesis that involves the planned construction of organic compounds/molecules from smaller units that possess functional groups. Friedrich Wöhler was the first scientist who designed the synthesis of an organic compound, urea from inorganic starting materials silver cyanate with ammonium chloride via a simple, one-step synthesis.

Question

3. Draw the complete mechanism and use the mechanism to predict the major product(s). Include
stereochemistry where appropriate.
a.
b.
H-Br
-78 °C
H-Br
-78 °C
H-Br
40 °C

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Step 1: 1,2- and 1,4-addition

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Step 2: Mechanism for 1,2-addition reaction

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Step 3: Stereochemistry

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