Diels-Alder Lab Question

Question

Do you expect there to be differences in the IR for the carbonyl stretches of maleic anhydride and the Diels-Alder adduct? If so, draw their structures and state which one you would expect to have the lowest wavenumber. Briefly explain your answer.

 

We are doing a Diels-Alder reaction using anthracene as our diene and maleic anhydride as our dienophile and we are using xylenes as our solvent.

Answer 1

Conjugated carbonyl stretch appears at lower frequency than a regular one.