ORGANIC CHEMISTRY-PRINT (LL)-W/WILEY
ORGANIC CHEMISTRY-PRINT (LL)-W/WILEY
4th Edition
ISBN: 9781119761105
Author: Klein
Publisher: WILEY
Question
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Chapter 16.4, Problem 6PTS

(a)

Interpretation Introduction

Interpretation:

For the each given reactions, the products and the mechanism that explains the formation of each product are needed to be determined.

Concept introduction:

  • Conjugated Dienes undergoes addition reactions with HBr as similar to simple alkenes addition with HBr .
  • The allylic carbocation is formed as an intermediate by the addition of proton in the HBr .
  • The Br (nucleophilic) can attacks in either of the two resonance stabilized carbocation’s in the in the allylic intermediate. 
  • Symmetrical diene like butadiene will produce only two products. Because the intermediates allylic carbocation formed are same.
  • For the Butadiene derivatives, there are four carbons for addition of proton, but at C1 and C4 carbons only forms the allylic carbocation.

To determine: the products and the mechanism that explains the formation of each product for the given reaction.

(b)

Interpretation Introduction

Interpretation:

For the each given reactions, the products and the mechanism that explains the formation of each product are needed to be determined.

Concept introduction:

  • Conjugated Dienes undergoes addition reactions with HBr as similar to simple alkenes addition with HBr .
  • The allylic carbocation is formed as an intermediate by the addition of proton in the HBr .
  • The Br (nucleophilic) can attacks in either of the two resonance stabilized carbocation’s in the in the allylic intermediate. 
  • Symmetrical diene like butadiene will produce only two products. Because the intermediates allylic carbocation formed are same.
  • For the Butadiene derivatives, there are four carbons for addition of proton, but at C1 and C4 carbons only forms the allylic carbocation.

(c)

Interpretation Introduction

Interpretation:

For the each given reactions, the products and the mechanism that explains the formation of each product are needed to be determined.

Concept introduction:

  • Conjugated Dienes undergoes addition reactions with HBr as similar to simple alkenes addition with HBr .
  • The allylic carbocation is formed as an intermediate by the addition of proton in the HBr .
  • The Br (nucleophilic) can attacks in either of the two resonance stabilized carbocation’s in the in the allylic intermediate. 
  • Symmetrical diene like butadiene will produce only two products. Because the intermediates allylic carbocation formed are same.
  • For the Butadiene derivatives, there are four carbons for addition of proton, but at C1 and C4 carbons only forms the allylic carbocation.

To determine: the products and the mechanism that explains the formation of each product for the given reaction.

(d)

Interpretation Introduction

Interpretation:

For the each given reactions, the products and the mechanism that explains the formation of each product are needed to be determined.

Concept introduction:

  • Conjugated Dienes undergoes addition reactions with HBr as similar to simple alkenes addition with HBr .
  • The allylic carbocation is formed as an intermediate by the addition of proton in the HBr .
  • The Br (nucleophilic) can attacks in either of the two resonance stabilized carbocation’s in the in the allylic intermediate. 
  • Symmetrical diene like butadiene will produce only two products. Because the intermediates allylic carbocation formed are same.
  • For the Butadiene derivatives, there are four carbons for addition of proton, but at C1 and C4 carbons only forms the allylic carbocation.

To determine: the products and the mechanism that explains the formation of each product for the given reaction.

(e)

Interpretation Introduction

Interpretation:

For the each given reactions, the products and the mechanism that explains the formation of each product are needed to be determined.

Concept introduction:

  • Conjugated Dienes undergoes addition reactions with HBr as similar to simple alkenes addition with HBr .
  • The allylic carbocation is formed as an intermediate by the addition of proton in the HBr .
  • The Br (nucleophilic) can attacks in either of the two resonance stabilized carbocation’s in the in the allylic intermediate. 
  • Symmetrical diene like butadiene will produce only two products. Because the intermediates allylic carbocation formed are same.
  • For the Butadiene derivatives, there are four carbons for addition of proton, but at C1 and C4 carbons only forms the allylic carbocation.

To determine: the products and the mechanism that explains the formation of each product for the given reaction.

(f)

Interpretation Introduction

Interpretation:

For the each given reactions, the products and the mechanism that explains the formation of each product are needed to be determined.

Concept introduction:

  • Conjugated Dienes undergoes addition reactions with HBr as similar to simple alkenes addition with HBr .
  • The allylic carbocation is formed as an intermediate by the addition of proton in the HBr .
  • The Br (nucleophilic) can attacks in either of the two resonance stabilized carbocation’s in the in the allylic intermediate. 
  • Symmetrical diene like butadiene will produce only two products. Because the intermediates allylic carbocation formed are same.
  • For the Butadiene derivatives, there are four carbons for addition of proton, but at C1 and C4 carbons only forms the allylic carbocation.

To determine: the products and the mechanism that explains the formation of each product for the given reaction.

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