(Solved): Problems 1. Predict the product in each of these Dicls-Alder reactions: 2. Cyclopentadiene reacts a ...

Problems 1. Predict the product in each of these Dicls-Alder reactions: 2. Cyclopentadiene reacts as a dienophile in the Diels-Alder reaction a great deal more readily than does 1,3-butadiene. Explain. 3. Predict the combination of diene and dienophile that would lead to \( \mathbf{a}, \mathbf{b} \) and \( \mathbf{c} \). 4. Dissociation of 3-sulfolene to form 1,3-butadiene generates one mole of sulphur dioxide gas per mole 1,3-butadiene. Large quantities of \( \mathrm{SO}_{2} \) would be generated if this reaction were carried out on a large scale. Suggest a method for trapping the gas to prevent its escape into the environment.