CHEM 262 ORG CHEM EBOOK DIGITAL DELIVERY
CHEM 262 ORG CHEM EBOOK DIGITAL DELIVERY
8th Edition
ISBN: 2818440043505
Author: Bruice
Publisher: PEARSON
Question
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Chapter 28, Problem 30P

(a)

Interpretation Introduction

Interpretation: It should be determined that the given reaction takes place whether by a concerted mechanism or not.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

  1. 1) Electrocyclic reactions
  2. 2) Cycloaddition reactions
  3. 3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

CHEM 262 ORG CHEM EBOOK DIGITAL DELIVERY, Chapter 28, Problem 30P , additional homework tip  1

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

(b)

Interpretation Introduction

Interpretation: It should be determined that the given reaction takes place whether by a concerted mechanism or not.

Concept introduction:

Pericyclic reactions are “ any concerted reaction in which bonds are formed or brocken in a cyclic transition state”. There is a single transition state from start to finish, in contrast to a stepwise reaction.

There are mainly three types of pericyclic reactions,

  1. 1) Electrocyclic reactions
  2. 2) Cycloaddition reactions
  3. 3) Sigmatropic reactions

In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”

CHEM 262 ORG CHEM EBOOK DIGITAL DELIVERY, Chapter 28, Problem 30P , additional homework tip  2

Sigmatropic rearrangement reactions are named with digits. For example a [1, 3] sigmatropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3.

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