Chapter 15, Problem 15.61AP

Interpretation Introduction

Interpretation:

The reason corresponding to the fact that $2,3\text{-dimethyl-}1,3\text{-butadiene}$ and maleic anhydride readily react to give a Diels-Alder adduct, but $2,3\text{-di-tert-butyl-}1,3\text{-butadiene}$ and maleic anhydride does not is to be stated.

Concept introduction:

Diels Alder reaction is the reaction between a substituted alkene which is known as dienophile and conjugated alkene known as diene. There is the formation of a new $\sigma$ bond and loss of $\text{π}$ bond takes place.