Which is an untrue statement concerning the Diels-Alder reaction?
A)The reaction is a syn addition.
B)The diene must be in the s-cis conformation to react.
C)Most Diels-Alder reactions are reversible.
D)Generally,the adduct formed most rapidly is the exo product.
E)Electron donating groups on the diene and electron withdrawing groups on the dieneophile favor adduct formation.

Question

Quizplus · Accepted Answer

The statement that the adduct formed most rapidly is the exo product is untrue regarding the Diels-Alder reaction. In fact, the endo product is often formed more rapidly due to the secondary orbital interactions (endo rule), despite the exo product sometimes being thermodynamically more stable.

Which Is an Untrue Statement Concerning the Diels-Alder Reaction