(a)
Interpretation:
A mechanism should be proposed for the given reaction.
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
Mechanism gives the step wise processes occurs in a particular reaction.
(b)
Interpretation:
The product should be determined for the given reaction if trans-2-butene were used instead of ethene.
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.
Mechanism gives the step wise processes occurs in a particular reaction.
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Organic Chemistry (8th Edition)
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- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning