Chapter 11, Problem 34P

Interpretation Introduction

Interpretation:

The structures for the products formed on reaction of $\text{2,3-dimethyl-1,3-butadiene}$ with each of the given reagents are to be written.

Concept introduction:

Conjugated dienes are hydrocarbons that two $\text{C=C}$ units are joined by a single bond.

Electrophilic addition is the reaction that break the $\pi$ bond and form new $\sigma$ bond.

Catalytic hydrogenation is a stereospecific “syn” addition; both hydrogens add to the same face of the double bond.

Mixtures of $\text{1,2-}$ and $\text{1,4-}$ addition products are obtained if a diene reacts with chlorine or bromine.

The Diels-Alder reaction is the conjugate addition of an alkene (the dienophile) to a conjugated diene. It is concerted and stereospecific.