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Chapter 15: Q20. (page 570)

Question: Which compounds can be prepared in good yield by allylic halogenation of an alkene?

a.

b.

c.

Short Answer

Expert verified

Answer

a. Heptane

b. Cannot be made

c. Cannot be made

Step by step solution

01

Halogenation

It involves the treatment of alkene with NBS in the presence of sunlight. The reaction yields the product via allylic substitution.

02

 Step 2: Explanation

a.

The allylic halogenation of cycloheptane forms 3-bromocyclohept-1-ene in a good yield. The reaction is shown below:

Formation of product in a

b.

The given compound can not be made via allylic halogenation method as the starting material (alkene) would produce the mixture of allylic halides.

c.

The given compound can not be made via allylic halogenation method as the starting material (alkene) would produce the mixture of allylic halides.

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Most popular questions from this chapter

Question: Draw the structure of the four allylic halides formed when 3-methylcyclohexene undergoes allylic halogenation with NBS + h谓.

Consider the following Bromination:

(a) Calculate 螖H掳 for this reaction by using the bond dissociation energies in Table 6.2.

(b) Draw out a stepwise mechanism for the reaction, including the initiation, propagation, and termination steps.

(c) Calculate 螖H掳 for each propagation step.

(d) Draw an energy diagram for the propagation steps.

(e) Draw the structure of the transition state of each propagation step

Question: Show all steps and reagents needed to convert cyclohexane into each compound: (a) the two enantiomers of trans-1,2-dibromocyclohexane; and (b) 1,2-epoxycyclohexane.

Question: What products are formed from monochlorination of (R)-2-bromobutane at C1 and C4? Assign R and S designations to each stereogenic center.

Question: Nitric oxide, NO鈥�, is another radical also thought to cause ozone destruction by a similar mechanism. One source of NO鈥� in the stratosphere is supersonic aircraft whose jet engines convert small amounts of N2 and O2 to NO鈥�. Write the propagation steps for the reaction of O3 with NO鈥�
See all solutions

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