does not undergo the Diels-Alder reaction as a diene because:
A)a bicyclic ring system cannot function as the diene component.
B)it cannot adopt the s-cis conformation.
C)it lacks electron-withdrawing groups.
D)it lacks strong electron-releasing groups.
E)the two double bonds are farther apart than in a non-cyclic conjugated system.

Question

does not undergo the Diels-Alder reaction as a diene because:
A)a bicyclic ring system cannot function as the diene component. 
B)it cannot adopt the s-cis conformation. 
C)it lacks electron-withdrawing groups. 
D)it lacks strong electron-releasing groups. 
E)the two double bonds are farther apart than in a non-cyclic conjugated system.

Quizplus · Accepted Answer

The Diels-Alder reaction requires the diene to be in the s-cis conformation for effective overlap with the dienophile. The bicyclic ring system in 11eaa4bc_3deb_2978_9180_5f7ec733c95e_TB5902_00 cannot adopt the s-cis conformation necessary for the reaction to occur.

Does Not Undergo the Diels-Alder Reaction as a Diene Because