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Chapter 8: Q.61 (page 330)

Draw a stepwise, detailed mechanism for the following reaction.

Short Answer

Expert verified

The mechanism for the formation of the substitution and elimination products are shown below:

Step by step solution

01

Types of reactions

Weak bases and weak nucleophiles such as water promote a mixture of both SN1 and E1 reactions.Here water is used, which acts both as a weak base and weak nucleophile. As a result, they give a mixture of both SN1 and E1 reactions.

02

Types of reactions by tertiary halides

Tertiary halides undergo a SN1 and E1 reaction respectively when a weak nucleophile and a weak base are used, such as water which is so observed in this reaction.

03

Similarities in both the reaction pathway

Both SN1 and E1 reactions are two-step processes, and carbocation formation is the rate-determining step.

By considering all the steps, the mechanism for the formation of the substitution and elimination products are shown below:

Representation of the detailed reaction schemes

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Most popular questions from this chapter

For which reaction mechanisms鈥�SN1,SN2,E1, or E2鈥攁re each of the following statements true? A statement may be true for one or more mechanisms.

a. The mechanism involves carbocation intermediates.

b. The mechanism has two steps.

c. The reaction rate increases with better leaving groups.

d. The reaction rate increases when the solvent is changed from CH3OHto localid="1648646954099" (CH3)2SO.

e. The reaction rate depends on the concentration of the alkyl halide only.

f. The mechanism is concerted.

g. The reaction of localid="1648646960420" CH3CH2Brwith NaOH occurs by this mechanism.

h. Racemization at a stereogenic center occurs.

i. Tertiary (3掳) alkyl halides react faster than 2掳 or 1掳 alkyl halides.

j. The reaction follows a second-order rate equation.

For each of the following alkenes, draw the structure of two different alkyl halides that yield the given alkene as the only product of dehydrohalogenation.

a.

b.

c.

Draw the structure of a dihalide that could be used to prepare each alkyne. There may be more than one possible dihalide.

a.

b.

c.

Draw an E1 mechanism for the following reaction. Draw the structure of the transition state for each step.

Label each pair of alkenes as constitutional isomers, stereoisomers, or identical.

a.

b.

c.

d.
See all solutions

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