The steps involved in the given reaction should be illustrated. 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. In an electrocyclic reaction “one new sigma- bond is formed or brocken.” Diels-Alder reaction is a cycloaddition reaction which is occurs between a conjugated diene and substituted alkene to form cyclohexene ring system. This concerted reaction can be accelerated by heating or using some catalysts. But in reverse Diels-Alder reaction, the six membered ring is break down to regenerate the diene and dienophile (substituted alkene) using high temperature. Mechanism gives the step wise processes occurs in a particular reaction.

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Please help me with # 4 and 5. Thanks in advance!

Answer 1

Question

Chapter 28, Problem 46P

Interpretation Introduction

Interpretation:

The steps involved in the given reaction should be illustrated.

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.

In an electrocyclic reaction “one new sigma- bond is formed or brocken.”

Diels-Alder reaction is a cycloaddition reaction which is occurs between a conjugated diene and substituted alkene to form cyclohexene ring system. This concerted reaction can be accelerated by heating or using some catalysts.

But in reverse Diels-Alder reaction, the six membered ring is break down to regenerate the diene and dienophile (substituted alkene) using high temperature.

Mechanism gives the step wise processes occurs in a particular reaction.

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