The Diels Alder reaction is a concerted reaction. Define concerted.
A) The product contains a cyclic ring.
B) The diene must be in the s-cis conformation to react.
C) All changes in bonding (bond making and bond breaking) occur simultaneously.
D) It is an endothermic reaction.
E) Both exo and endo products are formed.

Question

Quizplus · Accepted Answer

A concerted reaction is a type of reaction mechanism where all bond formations, breaking, and movements occur in a single step and simultaneously. In the Diels-Alder reaction, both the diene and the dienophile undergo changes in bonding during the reaction in a concerted manner.

The Diels Alder Reaction Is a Concerted Reaction