11. Radical Reactions

Predict the product of the following alkene addition reactions.

(a)

Predict the product of the following alkene addition reactions.

(c)

Suggest a mechanism for the following reactions.

(b)

Provide the mechanism of the radical reactions shown.

(a)

What alkyl halide will be obtained in greatest yield? Ignore stereoisomers.

d.

What alkyl halide will be obtained in greatest yield? Ignore stereoisomers.

c.

What five-carbon alkene forms the same product whether it reacts with HBr in the presence of a peroxide or with HBr in the absence of a peroxide?

Write the propagation steps for the addition of HBr to 1-methylcyclohexene in the presence of a peroxide

Predict the major products of the following alkene halogenation reactions. [D is the symbol for deuterium, an isotope of hydrogen.]

(a)

Predict the major products of the following alkene halogenation reactions. [D is the symbol for deuterium, an isotope of hydrogen.]

(b)

Provide the expected product for the reaction of each of the following alkenes with (i) HBr and (ii) HBr, H₂O₂.

(e)

Which reagent system (HBr or HBr, H₂O₂) would you use to carry out the following transformations?

(c)

Predict the product of the following alkene addition reactions.

(b)

What alkyl halide will be obtained in greatest yield? Ignore stereoisomers.

e.

Draw the structures of four six-carbon alkenes that form the same product, whether they react with HBr in the presence of a peroxide or with HBr in the absence of a peroxide.