What type of bond formation is central to the Diels-Alder reaction?
Ionic bond
Covalent bond
Sigma bond
Cycloaddition
Answer
Cycloaddition is the central bond formation in the Diels-Alder reaction. This reaction involves the addition of a conjugated diene to a dienophile, resulting in the formation of a cyclic product. The cycloaddition process occurs through a concerted mechanism, where two new sigma bonds are formed simultaneously while two pi bonds are broken. This reaction is highly stereospecific, leading to the formation of a specific stereoisomer of the cyclic product.
Mastering Molecules: The Kurt Alder Chemistry Challenge
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