Concept explainers
Interpretation:
The reason why the given molecule, being a conjugated diene, cannot undergo the Diels–Alder reaction is to be explained.
Concept introduction:
舧 Diels–Alder is a type of organic reaction in which substituted
舧 The general reaction of Diels–Alder is as follows:
舧 The Diels–Alder reaction is between a conjugate diene and a reactant containing double bond (dienophile) to form a product, which is called adduct.
舧 The Diels–Alder reactions are highly stereospecific. The configuration of dienophile is retained in the product and the reaction is the syn addition.
舧 The dienes react with dienophiles in cis form rather than trans form.
舧 Endo and exo refers to the orientation of dienophile and its electron withdrawing group, when it reacts with a diene in Diels Alder reaction.
舧 The reaction with orientation of electron-withdrawing group of dienophiles under the
舧 The reaction with orientation of electron-withdrawing group of dienophiles away from the
舧 Endo is favored in the transition state of Diels Alder reaction because of its lower energy.
舧 If a compound is stable, it has lower energy and if a compound is unstable, it has higher energy.
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