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Chapter 6: Problem 6.31 (page 241)

(a) Add curved arrows for each step to show how A is converted to the epoxy ketone C. (b) Classify the conversion of A to C as a substitution, elimination, or addition. (c) Draw one additional resonance structure for B.

Short Answer

Expert verified

(a)

Conversion of A to C(b) The reaction from step A to step B is an electrophilic addition reaction.

The reaction from step B to step C is a nucleophilic substitution reaction.

(c)Resonance structure of B

Step by step solution

01

Step-by-Step SolutionStep 1: Attack of the nucleophile

The nucleophile O--OH attacks the electrophilic center on the 伪,尾-unsaturated alkene.

02

Dehydroxylation

The OH- group bonded to the oxygen atom departs as the oxygen atom forms a bond with the nearby carbanionic center to form an epoxy ketone.

03

Determining the products of the given reaction

(a) The curved arrows to show the conversion of A to B are shown hereunder:

Conversion of A to C

(b) The reaction from step A to step B is an electrophilic addition reaction.

The reaction from step B to step C is a nucleophilic substitution reaction.

(c) The resonance structure for B is given hereunder.

Resonance structure of B

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Most popular questions from this chapter

Calculate 螖贬掳 for each oxidation reaction. Each equation is balanced as written; remember to take into account the coefficients in determining the number of bonds broken or formed.

[ 螖贬鈭�for O2=497kJ/mol ; 螖贬鈭�for one C=O in CO2=535kJ/mol]

a.role="math" localid="1648191068323" CH4+2O2鈫�CO2+2H2O

b.2CH4+7O2鈫�4CO2+6H2O

Write a rate equation for each reaction, given the indicated mechanism.

a.

b.

Consider the following energy diagram for the conversion of A鈫�G.

a. Which points on the graph correspond to transition states?

b. Which points on the graph correspond to reactive intermediates?

c. How many steps are present in the reaction mechanism?

d. Label each step of the mechanism as endothermic or exothermic.

e. Label the overall reaction as endothermic or exothermic.

Follow the curved arrows and draw the products of the following reaction.

Draw the transition state for each reaction.

a.

b.
See all solutions

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